paling: a fence made of upright pickets


picket ship: a ship serving as a picket


pickle barrel: a barrel holding vinegar in which cucumbers are pickled


pickup: a light truck with an open body and low sides and a tailboard


pickup truck: a light truck with an open body and low sides and a tailboard


pickup: anything with restorative powers


pick-me-up: anything with restorative powers


picot: an edging of small loops, as on lace or ribbon


picture: a visual representation (of an object or scene or person or abstraction) produced on a surface


image: a visual representation (of an object or scene or person or abstraction) produced on a surface


icon: a visual representation (of an object or scene or person or abstraction) produced on a surface


ikon: a visual representation (of an object or scene or person or abstraction) produced on a surface


picture book: a book consisting chiefly of pictures


picture frame: a framework in which a picture is mounted


picture hat: a woman's dressy hat with a wide brim


picture rail: rail fixed to a wall for hanging pictures


picture window: a large window with a single pane (usually overlooking a view)


piece: a separate part of a whole


piece: an item that is an instance of some type


piece of cloth: a separate part consisting of fabric


piece of material: a separate part consisting of fabric


piece of leather: a separate part consisting of leather


pied-a-terre: lodging for occasional or secondary use


pier: a platform built out from the shore into the water and supported by piles; provides access to ships and boats


wharf: a platform built out from the shore into the water and supported by piles; provides access to ships and boats


wharfage: a platform built out from the shore into the water and supported by piles; provides access to ships and boats


dock: a platform built out from the shore into the water and supported by piles; provides access to ships and boats


pier: a support for two adjacent bridge spans


pier: (architecture) a vertical supporting structure (as a portion of wall between two doors or windows)


pier arch: an arch supported on piers


pier glass: a large mirror between two windows


pier mirror: a large mirror between two windows


Pierre Laporte Bridge: a suspension bridge across the Saint Lawrence River at Quebec


pier table: a low table set below a pier glass


pieta: a representation of the Virgin Mary mourning over the dead body of Jesus


piezoelectric crystal: a crystal that can be used as a transducer


piezometer: a measuring instrument for measuring high pressures


pig: a crude block of metal (lead or iron) poured from a smelting furnace


pig bed: mold consisting of a bed of sand in which pig iron is cast


pig: mold consisting of a bed of sand in which pig iron is cast


piggery: a farm where pigs are raised or kept


pig farm: a farm where pigs are raised or kept


piggy bank: a child's coin bank (often shaped like a pig)


penny bank: a child's coin bank (often shaped like a pig)


pike: medieval weapon consisting of a spearhead attached to a long pole or pikestaff; superseded by the bayonet


pike: a sharp point (as on the end of a spear)


pikestaff: the staff of a pike


pilaster: a rectangular column that usually projects about a third of its width from the wall to which it is attached


pile: the yarn (as in a rug or velvet or corduroy) that stands up from the weave


nap: the yarn (as in a rug or velvet or corduroy) that stands up from the weave


pile: a column of wood or steel or concrete that is driven into the ground to provide support for a structure


spile: a column of wood or steel or concrete that is driven into the ground to provide support for a structure


piling: a column of wood or steel or concrete that is driven into the ground to provide support for a structure


stilt: a column of wood or steel or concrete that is driven into the ground to provide support for a structure


pile driver: a machine that drives piling into the ground


pill: a dose of medicine in the form of a small pellet


lozenge: a dose of medicine in the form of a small pellet


tablet: a dose of medicine in the form of a small pellet


tab: a dose of medicine in the form of a small pellet


pill: something that resembles a tablet of medicine in shape or size


pill: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception


birth control pill: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception


contraceptive pill: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception


oral contraceptive pill: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception


oral contraceptive: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception


anovulatory drug: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception


anovulant: a contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception


pillar box: a red pillar-shaped letter box


pill bottle: a small bottle for holding pills


pillbox: a small enclosed gun emplacement (usually of fortified concrete)


pillbox: a small case for holding pills


pillbox: a small round woman's hat


toque: a small round woman's hat


turban: a small round woman's hat


pillion: a seat behind the rider of a horse or motorbike etc.


pillory: a wooden instrument of punishment on a post with holes for the wrists and neck; offenders were locked in and so exposed to public scorn


pillow: a cushion to support the head of a sleeping person


pillow block: a cast-iron or steel block for supporting a journal or bearing


pillow lace: a handmade lace worked on a pillow with threads wound on bobbins; the pattern is marked out on the pillow by pins


bobbin lace: a handmade lace worked on a pillow with threads wound on bobbins; the pattern is marked out on the pillow by pins


pillow sham: bed linen consisting of a decorative cover for a pillow


pilocarpine: cholinergic alkaloid used in eyedrops to treat glaucoma


pilot balloon: meteorological balloon used to observe air currents


pilot bit: a small bit that drills a first hole to guide a larger drill


pilot boat: a boat to carry pilots to and from large ships


pilot burner: small auxiliary gas burner that provides a flame to ignite a larger gas burner


pilot light: small auxiliary gas burner that provides a flame to ignite a larger gas burner


pilot: small auxiliary gas burner that provides a flame to ignite a larger gas burner


pilot cloth: a thick blue cloth used to make overcoats and coats for sailors etc


pilot engine: a locomotive that precedes a train to check the track


pilothouse: an enclosed compartment from which a vessel can be navigated


wheelhouse: an enclosed compartment from which a vessel can be navigated


pilot light: indicator consisting of a light to indicate whether power is on or a motor is in operation


pilot lamp: indicator consisting of a light to indicate whether power is on or a motor is in operation


indicator lamp: indicator consisting of a light to indicate whether power is on or a motor is in operation


Pimlico: a racetrack for thoroughbred racing; site of the Preakness


pimozide: the most commonly used diphenylbutyl piperidine


pin: a small slender (often pointed) piece of wood or metal used to support or fasten or attach things


pin: a piece of jewelry that is pinned onto the wearer's garment


pin: flagpole used to mark the position of the hole on a golf green


flag: flagpole used to mark the position of the hole on a golf green


pin: cylindrical tumblers consisting of two parts that are held in place by springs; when they are aligned with a key the bolt can be thrown


pin tumbler: cylindrical tumblers consisting of two parts that are held in place by springs; when they are aligned with a key the bolt can be thrown


pinata: plaything consisting of a container filled with toys and candy; suspended from a height for blindfolded children to break with sticks


pinball machine: game equipment on which pinball is played


pin table: game equipment on which pinball is played


pince-nez: spectacles clipped to the nose by a spring


pincer: a hand tool for holding consisting of a compound lever for grasping


pair of pincers: a hand tool for holding consisting of a compound lever for grasping


tweezer: a hand tool for holding consisting of a compound lever for grasping


pair of tweezers: a hand tool for holding consisting of a compound lever for grasping


pinch bar: a lever with a pointed projection that serves as a fulcrum; used to roll heavy wheels


pincurl clip: a variety of clip for holding pin curls


pincushion: a small stiff cushion into which pins are stuck ready for use


pindolol: an oral beta blocker (trade name Visken) used in treating hypertension


Visken: an oral beta blocker (trade name Visken) used in treating hypertension


pine-tar rag: baseball equipment consisting of a rag soaked with pine tar; used on the handle of a baseball bat to give a batter a firm grip


pinfold: a pen where stray animals are confined


pinger: a pulse generator used for echo sounding in sonar


ping-pong ball: light hollow ball used in playing table tennis


pinhead: the head of a pin


pinhole: a small puncture that might have been made by a pin


pinion: a gear with a small number of teeth designed to mesh with a larger wheel or rack


pinnacle: (architecture) a slender upright spire at the top of a buttress of tower


pinner: a woman's cap with two long flaps pinned on


pinpoint: the sharp point of a pin


pinprick: small puncture (as if made by a pin)


pinstripe: a very thin stripe (especially a white stripe on a dark fabric)


pinstripe: a fabric with very thin stripes


pinstripe: a suit made from a fabric with very thin stripes


pintle: a pin or bolt forming the pivot of a hinge


pinwheel: a toy consisting of vanes of colored paper or plastic that is pinned to a stick and spins when it is pointed into the wind


pinwheel wind collector: a toy consisting of vanes of colored paper or plastic that is pinned to a stick and spins when it is pointed into the wind


pinwheel: a wheel that has numerous pins that are set at right angles to its rim


pin wrench: a wrench that has a projecting pin that fits into a socket on the object to be turned


pipe: a long tube made of metal or plastic that is used to carry water or oil or gas etc.


pipage: a long tube made of metal or plastic that is used to carry water or oil or gas etc.


piping: a long tube made of metal or plastic that is used to carry water or oil or gas etc.


pipe: a tube with a small bowl at one end; used for smoking tobacco


tobacco pipe: a tube with a small bowl at one end; used for smoking tobacco


tabor pipe: a small fipple flute that is played with the left hand while the right hand is free to beat a tabor


pipe: a tubular wind instrument


pipe bomb: a small homemade bomb usually contained in a metal pipe


pipe cleaner: cleaning implement consisting of a flexible tufted wire that is used to clean a pipe stem


pipe cutter: a hand tool for cutting pipe


pipefitting: fitting consisting of threaded pieces of pipe for joining pipes together


pipe fitting: fitting consisting of threaded pieces of pipe for joining pipes together


pipeline: a pipe used to transport liquids or gases


line: a pipe used to transport liquids or gases


piperacillin: a synthetic type of penicillin antibiotic (trade name Pipracil) used for moderate to severe infections


Pipracil: a synthetic type of penicillin antibiotic (trade name Pipracil) used for moderate to severe infections


pipe rack: a rack for holding a smoker's pipes


piperazine: vermifuge used to treat infestations by roundworms or pinworms


piperocaine: a compound used in the form of its hydrochloride as a local or spinal anesthetic


piperocaine hydrochloride: a compound used in the form of its hydrochloride as a local or spinal anesthetic


Metycaine: a compound used in the form of its hydrochloride as a local or spinal anesthetic


pipet: measuring instrument consisting of a graduated glass tube used to measure or transfer precise volumes of a liquid by drawing the liquid up into the tube


pipette: measuring instrument consisting of a graduated glass tube used to measure or transfer precise volumes of a liquid by drawing the liquid up into the tube


pipe vise: a clamp for holding pipe that is to be cut or threaded


pipe clamp: a clamp for holding pipe that is to be cut or threaded


pipe wrench: adjustable wrench for gripping and turning a pipe; has two serrated jaws that are adjusted to grip the pipe


tube wrench: adjustable wrench for gripping and turning a pipe; has two serrated jaws that are adjusted to grip the pipe


piping: a thin strip of covered cord used to edge hems


pique: tightly woven fabric with raised cords


pirate: a ship that is manned by pirates


pirate ship: a ship that is manned by pirates


piroxicam: a nonsteroidal anti-inflammatory drug (trade name Feldene) used to treat arthritis and other inflammatory conditions


Feldene: a nonsteroidal anti-inflammatory drug (trade name Feldene) used to treat arthritis and other inflammatory conditions


piste: a ski run densely packed with snow


piste: a flat rectangular area for fencing bouts


pistol: a firearm that is held and fired with one hand


handgun: a firearm that is held and fired with one hand


side arm: a firearm that is held and fired with one hand


shooting iron: a firearm that is held and fired with one hand


pistol grip: a handle (as of a gun or saw) shaped like the butt of a pistol


piston: mechanical device that has a plunging or thrusting motion


plunger: mechanical device that has a plunging or thrusting motion


piston ring: seal consisting of a split metal ring that seals the gap between a piston and the cylinder wall


piston rod: connecting rod that moves or is moved by a piston


pit: a surface excavation for extracting stone or slate


quarry: a surface excavation for extracting stone or slate


stone pit: a surface excavation for extracting stone or slate


pit: a trap in the form of a concealed hole


pitfall: a trap in the form of a concealed hole


pit: (auto racing) an area at the side of a racetrack where the race cars are serviced and refueled


pit: (commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on


pit: an enclosure in which animals are made to fight


pitcher: an open vessel with a handle and a spout for pouring


ewer: an open vessel with a handle and a spout for pouring


pitchfork: a long-handled hand tool with sharp widely spaced prongs for lifting and pitching hay


pitching wedge: a wedge used to loft the golf ball over obstacles


pitch pipe: a small pipe sounding a tone of standard frequency; used to establish the starting pitch for unaccompanied singing


pithead: the entrance to a coal mine


pith hat: a lightweight hat worn in tropical countries for protection from the sun


pith helmet: a lightweight hat worn in tropical countries for protection from the sun


sun helmet: a lightweight hat worn in tropical countries for protection from the sun


topee: a lightweight hat worn in tropical countries for protection from the sun


topi: a lightweight hat worn in tropical countries for protection from the sun


piton: a metal spike with a hole for a rope; mountaineers drive it into ice or rock to use as a hold


Pitot-static tube: measuring instrument consisting of a combined Pitot tube and static tube that measures total and static pressure; used in aircraft to measure airspeed


Pitot head: measuring instrument consisting of a combined Pitot tube and static tube that measures total and static pressure; used in aircraft to measure airspeed


Pitot tube: measuring instrument consisting of a combined Pitot tube and static tube that measures total and static pressure; used in aircraft to measure airspeed


Pitot tube: measuring instrument consisting of a right-angled tube with an open end that is directed in opposition to the flow of a fluid and used to measure the velocity of fluid flow


Pitot: measuring instrument consisting of a right-angled tube with an open end that is directed in opposition to the flow of a fluid and used to measure the velocity of fluid flow


pitprop: a wooden prop used to support the roof of a mine


sprag: a wooden prop used to support the roof of a mine


pitsaw: a large two-handed saw formerly used to cut logs into planks; one man stood above the log and the other in a pit below


pivot: axis consisting of a short shaft that supports something that turns


pin: axis consisting of a short shaft that supports something that turns


pivoting window: a window that opens by pivoting either horizontally or vertically


pixel: (computer science) the smallest discrete component of an image or picture on a CRT screen (usually a colored dot)


pel: (computer science) the smallest discrete component of an image or picture on a CRT screen (usually a colored dot)


picture element: (computer science) the smallest discrete component of an image or picture on a CRT screen (usually a colored dot)


pizzeria: a shop where pizzas are made and sold


pizza shop: a shop where pizzas are made and sold


pizza parlor: a shop where pizzas are made and sold


placebo: an innocuous or inert medication; given as a pacifier or to the control group in experiments on the efficacy of a drug


place mat: a mat serving as table linen for an individual place setting


place of business: an establishment (a factory or an assembly plant or retail store or warehouse etc.) where business is conducted, goods are made or stored or processed or where services are rendered


business establishment: an establishment (a factory or an assembly plant or retail store or warehouse etc.) where business is conducted, goods are made or stored or processed or where services are rendered


place of worship: any building where congregations gather for prayer


house of prayer: any building where congregations gather for prayer


house of God: any building where congregations gather for prayer


house of worship: any building where congregations gather for prayer


place setting: a table service for one person


setting: a table service for one person


placket: a piece of cloth sewn under an opening


plain weave: a basic style of weave in which the weft and warp threads intertwine alternately to produce a checkerboard effect


taffeta weave: a basic style of weave in which the weft and warp threads intertwine alternately to produce a checkerboard effect


plan: scale drawing of a structure


architectural plan: scale drawing of a structure


planchet: a flat metal disk ready for stamping as a coin


coin blank: a flat metal disk ready for stamping as a coin


planchette: a triangular board supported on casters; when lightly touched with the fingertips it is supposed to spell out supernatural (or unconscious) messages


plane: a carpenter's hand tool with an adjustable blade for smoothing or shaping wood


carpenter's plane: a carpenter's hand tool with an adjustable blade for smoothing or shaping wood


woodworking plane: a carpenter's hand tool with an adjustable blade for smoothing or shaping wood


plane: a power tool for smoothing or shaping wood


planer: a power tool for smoothing or shaping wood


planing machine: a power tool for smoothing or shaping wood


plane seat: a seat on a commercial airliner


plane table: surveying instrument consisting of a drawing board and a ruler that are mounted on a tripod; used to sight and map topographical details


planetarium: an apparatus or model for representing the solar systems


planetarium: an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome


planetarium: a building housing an instrument for projecting the positions of the planets onto a domed ceiling


planetary gear: an outer gear that revolves about a central sun gear of an epicyclic train


epicyclic gear: an outer gear that revolves about a central sun gear of an epicyclic train


planet wheel: an outer gear that revolves about a central sun gear of an epicyclic train


planet gear: an outer gear that revolves about a central sun gear of an epicyclic train


plank-bed: a bed of boards (without a mattress)


planking: (nautical) a covering or flooring constructed of planks (as on a ship)


planner: a notebook for recording appointments and things to be done, etc.


plant: buildings for carrying on industrial labor


works: buildings for carrying on industrial labor


industrial plant: buildings for carrying on industrial labor


planter: a decorative pot for house plants


plaster: adhesive tape used in dressing wounds


adhesive plaster: adhesive tape used in dressing wounds


sticking plaster: adhesive tape used in dressing wounds


plaster: a surface of hardened plaster (as on a wall or ceiling)


plasterwork: a surface of hardened plaster (as on a wall or ceiling)


plasterboard: wallboard with a gypsum plaster core bonded to layers of paper or fiberboard; used instead of plaster or wallboard to make interior walls


gypsum board: wallboard with a gypsum plaster core bonded to layers of paper or fiberboard; used instead of plaster or wallboard to make interior walls


plastering trowel: a trowel used to spread and smooth plaster


plastic art: the arts of shaping or modeling; carving and sculpture


plastic bag: a bag made of thin plastic material


plastic bomb: a bomb made of plastic explosive


plastic explosive: an explosive material that is easily molded around the object it is intended to destroy


plastique: an explosive material that is easily molded around the object it is intended to destroy


plastic laminate: a laminate made by bonding plastic layers


plastic wrap: wrapping consisting of a very thin transparent sheet of plastic


plastron: a large pad worn by a fencer to protect the chest


plastron: a metal breastplate that was worn under a coat of mail


plastron: the front of man's dress shirt


plastron: the ornamental front of a woman's bodice or shirt


plat: a map showing planned or actual features of an area (streets and building lots etc.)


plate: dish on which food is served or from which food is eaten


plate: a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners)


scale: a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners)


shell: a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners)


plate: a sheet of metal or wood or glass or plastic


plate: a shallow receptacle for collection in church


collection plate: a shallow receptacle for collection in church


plate: structural member consisting of a horizontal beam that provides bearing and anchorage


plate: a full-page illustration (usually on slick paper)


plate: a flat sheet of metal or glass on which a photographic image can be recorded


photographic plate: a flat sheet of metal or glass on which a photographic image can be recorded


plate: the positively charged electrode in a vacuum tube


plate glass: glass formed into large thin sheets


sheet glass: glass formed into large thin sheets


plate iron: a plate of iron


platen: the roller on a typewriter against which the keys strike


platen: the flat plate of a printing press that presses the paper against the type


platen: work table of a machine tool


plate rack: a rack for holding plates to dry after they have been washed


plate rail: rail or narrow shelf fixed to a wall to display plates


platform: a raised horizontal surface


platform: any military structure or vehicle bearing weapons


weapons platform: any military structure or vehicle bearing weapons


platform: the combination of a particular computer and a particular operating system


platform bed: a bed without springs


platform rocker: rocking chair on a stationary base


plating: a thin coating of metal deposited on a surface


metal plating: a thin coating of metal deposited on a surface


platter: a large shallow dish used for serving food


playback: electronic equipment comprising the part of a tape recorder that reproduces the recorded material


playbox: a box for a child's toys and personal things (especially at a boarding school)


play-box: a box for a child's toys and personal things (especially at a boarding school)


playground: yard consisting of an outdoor area for children's play


playhouse: plaything consisting of a small model of a house that children can play inside of


wendy house: plaything consisting of a small model of a house that children can play inside of


playing card: one of a pack of cards that are used to play card games


playpen: a portable enclosure in which babies may be left to play


pen: a portable enclosure in which babies may be left to play


playsuit: a sports outfit for women or children; usually consists of shorts and a blouse


plaything: an artifact designed to be played with


toy: an artifact designed to be played with


plaza: mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace


mall: mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace


center: mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace


shopping mall: mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace


shopping center: mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace


shopping centre: mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace


pleat: any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape


plait: any of various types of fold formed by doubling fabric back upon itself and then pressing or stitching into shape


plenum: an enclosed space in which the air pressure is higher than outside


plethysmograph: a measuring instrument for measuring changes in volume of a part or organ or whole body (usually resulting from fluctuations in the amount of blood it contains)


pleximeter: a small thin metal plate held against the body and struck with a plexor in percussive examinations


plessimeter: a small thin metal plate held against the body and struck with a plexor in percussive examinations


plexor: (medicine) a small hammer with a rubber head used in percussive examinations of the chest and in testing reflexes


plessor: (medicine) a small hammer with a rubber head used in percussive examinations of the chest and in testing reflexes


percussor: (medicine) a small hammer with a rubber head used in percussive examinations of the chest and in testing reflexes


pliers: a gripping hand tool with two hinged arms and (usually) serrated jaws


pair of pliers: a gripping hand tool with two hinged arms and (usually) serrated jaws


plyers: a gripping hand tool with two hinged arms and (usually) serrated jaws


plimsoll: a light gym shoe with a rubber sole and a canvas top


plotter: an instrument (usually driven by a computer) for drawing graphs or pictures


plow: a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing


plough: a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing


plowshare: a sharp steel wedge that cuts loose the top layer of soil


ploughshare: a sharp steel wedge that cuts loose the top layer of soil


share: a sharp steel wedge that cuts loose the top layer of soil


plug: blockage consisting of an object designed to fill a hole tightly


stopper: blockage consisting of an object designed to fill a hole tightly


stopple: blockage consisting of an object designed to fill a hole tightly


plug: an electrical device with two or three pins that is inserted in a socket to make an electrical connection


male plug: an electrical device with two or three pins that is inserted in a socket to make an electrical connection


plug fuse: a fuse with a thread that screws into a socket


plughole: a hole into which a plug fits (especially a hole where water drains away)


plumb bob: the metal bob of a plumb line


plumb: the metal bob of a plumb line


plummet: the metal bob of a plumb line


plumber's snake: a long flexible steel coil for dislodging stoppages in curved pipes


auger: a long flexible steel coil for dislodging stoppages in curved pipes


plumbing: utility consisting of the pipes and fixtures for the distribution of water or gas in a building and for the disposal of sewage


plumbing system: utility consisting of the pipes and fixtures for the distribution of water or gas in a building and for the disposal of sewage


plumbing fixture: a fixture for the distribution and use of water in a building


plumb level: a carpenter's level with a plumb line at right angles to it


plumb line: a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point


perpendicular: a cord from which a metal weight is suspended pointing directly to the earth's center of gravity; used to determine the vertical from a given point


plumb rule: a plumb line attached to a narrow board


plume: a feather or cluster of feathers worn as an ornament


plunger: hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains


plumber's helper: hand tool consisting of a stick with a rubber suction cup at one end; used to clean clogged drains


plus fours: men's baggy knickers hanging below the knees; formerly worn for sports (especially golf)


plush: a fabric with a nap that is longer and softer than velvet


plutonium trigger: a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives


plutonium pit: a steel or beryllium sphere containing plutonium 239 that triggers nuclear fission when compressed by explosives


ply: (usually in combinations) one of several layers of cloth or paper or wood as in plywood


ply: one of the strands twisted together to make yarn or rope or thread; often used in combination


plywood: a laminate made of thin layers of wood


plyboard: a laminate made of thin layers of wood


pneumatic drill: a power drill powered by compressed air


pneumatic tire: a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc


pneumatic tyre: a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc


pneumococcal vaccine: vaccine (trade name Pneumovax) effective against the 23 most common strains of pneumococcus


Pneumovax: vaccine (trade name Pneumovax) effective against the 23 most common strains of pneumococcus


p-n junction: the junction between a p-type semiconductor and an n-type semiconductor


p-n-p transistor: a junction transistor having an n-type semiconductor between a p-type semiconductor that serves as an emitter and a p-type semiconductor that serves as a collector


poacher: a cooking vessel designed to poach food (such as fish or eggs)


pocket: a small pouch inside a garment for carrying small articles


pocket: an opening at the corner or on the side of a billiard table into which billiard balls are struck


pocket battleship: a small battleship built to conform with treaty limitations on tonnage and armament (from 1925 to 1930)


pocketbook: pocket-sized paperback book


pocket book: pocket-sized paperback book


pocket edition: pocket-sized paperback book


pocketcomb: a small comb suitable for carrying in a pocket


pocket comb: a small comb suitable for carrying in a pocket


pocket flap: a flap that covers the access to a pocket


pocket-handkerchief: a handkerchief that is carried in a pocket


pocketknife: a knife with a blade that folds into the handle; suitable for carrying in the pocket


pocket knife: a knife with a blade that folds into the handle; suitable for carrying in the pocket


pocket watch: a watch that is carried in a small watch pocket


pod: a detachable container of fuel on an airplane


fuel pod: a detachable container of fuel on an airplane


pogo stick: plaything consisting of a pole with foot rests and a strong spring; propelled by jumping


point: sharp end


point: a wall socket


power point: a wall socket


point: the gun muzzle's direction


gunpoint: the gun muzzle's direction


point-and-shoot camera: a lightweight photographic camera with an autofocus


pointed arch: an arch with a pointed apex; characteristic of Gothic architecture


pointer: an indicator as on a dial


pointillism: a genre of painting characterized by the application of paint in dots and small strokes; developed by Georges Seurat and his followers in late 19th century France


pointing trowel: a trowel used to fill and finish masonry joints with mortar or cement


point lace: lace worked with a needle in a buttonhole stitch on a paper pattern


needlepoint: lace worked with a needle in a buttonhole stitch on a paper pattern


poker: fire iron consisting of a metal rod with a handle; used to stir a fire


stove poker: fire iron consisting of a metal rod with a handle; used to stir a fire


fire hook: fire iron consisting of a metal rod with a handle; used to stir a fire


salamander: fire iron consisting of a metal rod with a handle; used to stir a fire


polarimeter: an optical device used to measure the rotation of the plane of vibration of polarized light


polariscope: an optical device used to measure the rotation of the plane of vibration of polarized light


Polaroid: (trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare


Polaroid camera: a camera that develops and produces a positive print within seconds


Polaroid Land camera: a camera that develops and produces a positive print within seconds


pole: a long (usually round) rod of wood or metal or plastic


pole: one of the two ends of a magnet where the magnetism seems to be concentrated


magnetic pole: one of the two ends of a magnet where the magnetism seems to be concentrated


pole: a long fiberglass sports implement used for pole vaulting


poleax: a battle ax used in the Middle Ages; a long handled ax and a pick


poleaxe: a battle ax used in the Middle Ages; a long handled ax and a pick


poleax: an ax used to slaughter cattle; has a hammer opposite the blade


poleaxe: an ax used to slaughter cattle; has a hammer opposite the blade


police boat: a boat used by harbor police


police station: a station that serves as headquarters for police in a particular district; serves as a place from which policemen are dispatched and to which arrested persons are brought


police headquarters: a station that serves as headquarters for police in a particular district; serves as a place from which policemen are dispatched and to which arrested persons are brought


station house: a station that serves as headquarters for police in a particular district; serves as a place from which policemen are dispatched and to which arrested persons are brought


police van: van used by police to transport prisoners


police wagon: van used by police to transport prisoners


paddy wagon: van used by police to transport prisoners


patrol wagon: van used by police to transport prisoners


wagon: van used by police to transport prisoners


black Maria: van used by police to transport prisoners


poliovirus vaccine: vaccine prepared from poliovirus to provide immunity to poliomyelitis


polka dot: design consisting of a pattern of regularly spaced circular spots


polling booth: a temporary booth in a polling place which people enter to cast their votes


polo ball: wooden ball that is struck with mallets in playing polo


polo mallet: a mallet used to strike the ball in polo


polo stick: a mallet used to strike the ball in polo


polonaise: a woman's dress with a tight bodice and an overskirt drawn back to reveal a colorful underskirt


polo shirt: a shirt with short sleeves designed for comfort and casual wear


sport shirt: a shirt with short sleeves designed for comfort and casual wear


polychrome: a piece of work composed of or decorated in many colors


polyconic projection: a conic projection of a map having distances between meridians equal to those distances on a globe


polyester: any of a large class of synthetic fabrics


polygraph: a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration)


polymyxin: any of several toxic antibiotics obtained from a particular soil bacterium


polypropenonitrile: acrylic resin used to make a strong soft crease-resistant fabric (trade name Acrilan)


Acrilan: acrylic resin used to make a strong soft crease-resistant fabric (trade name Acrilan)


pomade: hairdressing consisting of a perfumed oil or ointment


pomatum: hairdressing consisting of a perfumed oil or ointment


pommel: handgrip formed by the raised front part of a saddle


saddlebow: handgrip formed by the raised front part of a saddle


pommel: a handgrip that a gymnast uses when performing exercises on a pommel horse


pommel horse: a gymnastic horse with a cylindrical body covered with leather and two upright handles (pommels) near the center; held upright by two steel supports, one at each end


side horse: a gymnastic horse with a cylindrical body covered with leather and two upright handles (pommels) near the center; held upright by two steel supports, one at each end


pompon: decoration consisting of a ball of tufted wool or silk; usually worn on a hat


pom-pom: decoration consisting of a ball of tufted wool or silk; usually worn on a hat


poncho: a blanket-like cloak with a hole in the center for the head


pongee: a soft thin cloth woven from raw silk (or an imitation)


poniard: a dagger with a slender blade


bodkin: a dagger with a slender blade


Ponte 25 de Abril: a suspension bridge across the Tagus River at Lisbon


pontifical: the vestments and other insignia of a pontiff (especially a bishop)


pontoon: a float supporting a seaplane


pontoon: (nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge


pontoon bridge: a temporary bridge built over a series of pontoons


bateau bridge: a temporary bridge built over a series of pontoons


floating bridge: a temporary bridge built over a series of pontoons


pony cart: a cart with an underslung axle and two seats


ponycart: a cart with an underslung axle and two seats


donkey cart: a cart with an underslung axle and two seats


tub-cart: a cart with an underslung axle and two seats


pool: an excavation that is (usually) filled with water


pool ball: ball used in playing pool


poolroom: a room with pool tables where pool is played


pool table: game equipment consisting of a heavy table on which pool is played


billiard table: game equipment consisting of a heavy table on which pool is played


snooker table: game equipment consisting of a heavy table on which pool is played


poop deck: an exposed partial weather deck on the stern superstructure of a ship


poor box: box for collecting alms, especially one in a church


alms box: box for collecting alms, especially one in a church


mite box: box for collecting alms, especially one in a church


poorhouse: an establishment maintained at public expense in order to provide housing for the poor and homeless


Pop Art: a school of art that emerged in the United Kingdom in the 1950s and became prevalent in the United States and the United Kingdom in the 1960s; it imitated the techniques of commercial art (as the soup cans of Andy Warhol) and the styles of popular culture and the mass media


pop bottle: a bottle for holding soft drinks


soda bottle: a bottle for holding soft drinks


popgun: plaything consisting of a toy gun that makes a popping sound


poplin: a ribbed fabric used in clothing and upholstery


popper: a container for cooking popcorn


popper: a container of stimulant drug (amyl nitrate or butyl nitrite)


poppet: a mushroom-shaped valve that rises perpendicularly from its seat; commonly used in internal-combustion engines


poppet valve: a mushroom-shaped valve that rises perpendicularly from its seat; commonly used in internal-combustion engines


pop tent: a small tent that is easy to carry and quick to set up


porcelain: ceramic ware made of a more or less translucent ceramic


porch: a structure attached to the exterior of a building often forming a covered entrance


porkpie: man's hat with a low, flat crown and a snap brim


porkpie hat: man's hat with a low, flat crown and a snap brim


porringer: a shallow metal bowl (usually with a handle)


port: an opening (in a wall or ship or armored vehicle) for firing through


embrasure: an opening (in a wall or ship or armored vehicle) for firing through


porthole: an opening (in a wall or ship or armored vehicle) for firing through


portable: a small light typewriter; usually with a case in which it can be carried


portable computer: a personal computer that can easily be carried by hand


portable circular saw: a circular saw that is portable and is operated with a hand grip


portable saw: a circular saw that is portable and is operated with a hand grip


portage: overland track between navigable waterways


portal: a grand and imposing entrance (often extended metaphorically)


portcullis: gate consisting of an iron or wooden grating that hangs in the entry to a castle or fortified town; can be lowered to prevent passage


porte-cochere: canopy extending out from a building entrance to shelter those getting in and out of vehicles


porte-cochere: a carriage entrance passing through a building to an enclosed courtyard


portfolio: a large, flat, thin case for carrying loose papers or drawings or maps; usually leather


porthole: a window in a ship or airplane


portico: a porch or entrance to a building consisting of a covered and often columned area


portiere: a heavy curtain hung across a doorway


portmanteau: a large travelling bag made of stiff leather


Gladstone: a large travelling bag made of stiff leather


Gladstone bag: a large travelling bag made of stiff leather


portrait: any likeness of a person, in any medium


portrayal: any likeness of a person, in any medium


portrait camera: a camera with a portrait lens


portrait lens: a compound camera lens with a relatively high aperture


positive: a film showing a photographic image whose tones correspond to those of the original subject


positive pole: the pole of a magnet that points toward the north when the magnet is suspended freely


positive magnetic pole: the pole of a magnet that points toward the north when the magnet is suspended freely


north-seeking pole: the pole of a magnet that points toward the north when the magnet is suspended freely


positive pole: the terminal of a battery that is connected to the positive plate


positron emission tomography scanner: a tomograph that produces cross-sectional X-rays of metabolic processes in the body


PET scanner: a tomograph that produces cross-sectional X-rays of metabolic processes in the body


post: an upright consisting of a piece of timber or metal fixed firmly in an upright position


postage meter: meter for bulk mailings that imprints correct prepaid postage on pieces of mail and records the total charge


post and lintel: a structure consisting of vertical beams (posts) supporting a horizontal beam (lintel)


postbox: public box for deposit of mail


mailbox: public box for deposit of mail


letter box: public box for deposit of mail


post chaise: closed horse-drawn carriage with four wheels; formerly used to transport passengers and mail


postern: a small gate in the rear of a fort or castle


post exchange: a commissary on a United States Army post


PX: a commissary on a United States Army post


posthole: a hole dug in the ground to hold a fence post


post hole: a hole dug in the ground to hold a fence post


posthole digger: a shovel used to sink postholes


post-hole digger: a shovel used to sink postholes


post horn: wind instrument used by postilions of the 18th and 19th centuries


posthouse: an inn for exchanging post horses and accommodating riders


post house: an inn for exchanging post horses and accommodating riders


postmodernism: genre of art and literature and especially architecture in reaction against principles and practices of established modernism


Post-Office box: a numbered compartment in a post office where mail is put to be called for


PO Box: a numbered compartment in a post office where mail is put to be called for


POB: a numbered compartment in a post office where mail is put to be called for


call box: a numbered compartment in a post office where mail is put to be called for


letter box: a numbered compartment in a post office where mail is put to be called for


post road: a road over which mail is carried


pot: metal or earthenware cooking vessel that is usually round and deep; often has a handle and lid


pot: street names for marijuana


grass: street names for marijuana


green goddess: street names for marijuana


dope: street names for marijuana


weed: street names for marijuana


gage: street names for marijuana


sess: street names for marijuana


sens: street names for marijuana


smoke: street names for marijuana


skunk: street names for marijuana


locoweed: street names for marijuana


Mary Jane: street names for marijuana


pot: a container in which plants are cultivated


flowerpot: a container in which plants are cultivated


potbelly: a bulbous stove in which wood or coal is burned


potbelly stove: a bulbous stove in which wood or coal is burned


Potemkin village: something that seems impressive but in fact lacks substance


potential divider: resistors connected in series across a voltage source; used to obtain a desired fraction of the voltage


voltage divider: resistors connected in series across a voltage source; used to obtain a desired fraction of the voltage


potentiometer: a resistor with three terminals, the third being an adjustable center terminal; used to adjust voltages in radios and TV sets


pot: a resistor with three terminals, the third being an adjustable center terminal; used to adjust voltages in radios and TV sets


potentiometer: a measuring instrument for measuring direct current electromotive forces


pot farm: a plot of ground where marijuana is grown and harvested (often hidden in a national forest)


potholder: an insulated pad for holding hot pots


pothook: an S-shaped hook to suspend a pot over a fire


potpourri: a jar of mixed flower petals and spices used as perfume


potsherd: a shard of pottery


potter's wheel: a horizontal rotating wheel holding the clay being shaped by a potter


pottery: ceramic ware made from clay and baked in a kiln


clayware: ceramic ware made from clay and baked in a kiln


pottery: a workshop where clayware is made


pottle: a pot that holds 2 quarts


potty seat: toilet consisting of a small seat used by young children


potty chair: toilet consisting of a small seat used by young children


pouch: a small or medium size container for holding or carrying things


poultice: a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.


cataplasm: a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.


plaster: a medical dressing consisting of a soft heated mass of meal or clay that is spread on a cloth and applied to the skin to treat inflamed areas or improve circulation etc.


pound: a public enclosure for stray or unlicensed dogs


dog pound: a public enclosure for stray or unlicensed dogs


pound net: trap consisting of an arrangement of nets directing fish into an enclosure


powder: any of various cosmetic or medical preparations dispensed in the form of a pulverized powder


powder and shot: ammunition consisting of gunpowder and bullets for muskets


powdered mustard: a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic


dry mustard: a substance such that one to three tablespoons dissolved in a glass of warm water is a homemade emetic


powder horn: container for carrying gunpowder; made of the hollow horn of an animal


powder flask: container for carrying gunpowder; made of the hollow horn of an animal


powder keg: keg (usually made of metal) for gunpowder or blasting powder


powderpuff: a soft spherical object made from fluffy fibers; for applying powder to the skin


puff: a soft spherical object made from fluffy fibers; for applying powder to the skin


power brake: a brake on an automobile that magnifies a small force applied to the brake pedal into a proportionately larger force applied to slow or stop the vehicle


power cord: a cord to conduct power to an electrical appliance


power drill: a power tool for drilling holes into hard materials


power line: cable used to distribute electricity


power cable: cable used to distribute electricity


power loom: a loom operated mechanically


power module: module that provides power to operate other modules


power mower: a lawn mower powered by a gasoline motor


motor mower: a lawn mower powered by a gasoline motor


power pack: a device for converting a power supply to a voltage required by particular equipment


power saw: a power tool for cutting wood


saw: a power tool for cutting wood


sawing machine: a power tool for cutting wood


power shovel: a machine for excavating


excavator: a machine for excavating


digger: a machine for excavating


shovel: a machine for excavating


power station: an electrical generating station


power plant: an electrical generating station


powerhouse: an electrical generating station


power steering: automotive steering where engineer power amplifies the torque applied to the steering wheel


power-assisted steering: automotive steering where engineer power amplifies the torque applied to the steering wheel


power system: a system of high tension cables by which electrical power is distributed throughout a region


power grid: a system of high tension cables by which electrical power is distributed throughout a region


grid: a system of high tension cables by which electrical power is distributed throughout a region


power takeoff: a device that transfers power from an engine (as in a tractor or other motor vehicle) to another piece of equipment (as to a pump or jackhammer)


PTO: a device that transfers power from an engine (as in a tractor or other motor vehicle) to another piece of equipment (as to a pump or jackhammer)


power tool: a tool driven by a motor


practice range: a place for practicing golf shots


praetorium: the tent of an ancient Roman general


pretorium: the tent of an ancient Roman general


pravastatin: an oral drug (trade name Pravachol) administered to reduce blood cholesterol levels; recommended after nonfatal heart attacks


Pravachol: an oral drug (trade name Pravachol) administered to reduce blood cholesterol levels; recommended after nonfatal heart attacks


prayer rug: a small rug used by Muslims during their devotions


prayer mat: a small rug used by Muslims during their devotions


prayer shawl: (Judaism) a shawl with a ritually knotted fringe at each corner; worn by Jews at morning prayer


tallith: (Judaism) a shawl with a ritually knotted fringe at each corner; worn by Jews at morning prayer


tallis: (Judaism) a shawl with a ritually knotted fringe at each corner; worn by Jews at morning prayer


prazosin: antihypertensive drug (trade name Minipress)


Minipress: antihypertensive drug (trade name Minipress)


precipitator: removes dust particles from gases by electrostatic precipitation


electrostatic precipitator: removes dust particles from gases by electrostatic precipitation


Cottrell precipitator: removes dust particles from gases by electrostatic precipitation


predictor: a computer for controlling antiaircraft fire that computes the position of an aircraft at the instant of a shell's arrival


prefab: a prefabricated structure


presbytery: building reserved for the officiating clergy


prescription drug: a drug that is available only with written instructions from a doctor or dentist to a pharmacist


prescription: a drug that is available only with written instructions from a doctor or dentist to a pharmacist


prescription medicine: a drug that is available only with written instructions from a doctor or dentist to a pharmacist


ethical drug: a drug that is available only with written instructions from a doctor or dentist to a pharmacist


presence chamber: room in which a monarch or other great person receives guests, assemblies, etc.


presidio: a fortress established in the southwestern United States by the Spanish in order to protect their missions and other holdings


press: any machine that exerts pressure to form or shape or cut materials or extract liquids or compress solids


mechanical press: any machine that exerts pressure to form or shape or cut materials or extract liquids or compress solids


press: a machine used for printing


printing press: a machine used for printing


press: clamp to prevent wooden rackets from warping when not in use


press box: box reserved for reporters (as at a sports event)


press gallery: an area (sometimes in a balcony) set aside for reporters (especially in a legislative hall)


pressing: a metal or plastic part that is made by a mechanical press


press of sail: the greatest amount of sail that a ship can carry safely


press of canvas: the greatest amount of sail that a ship can carry safely


pressure cabin: cabin consisting of the pressurized section of an aircraft or spacecraft


pressure cooker: autoclave for cooking at temperatures above the boiling point of water


pressure dome: a dome-shaped building that is pressurized


pressure gauge: gauge for measuring and indicating fluid pressure


pressure gage: gauge for measuring and indicating fluid pressure


pressurized water reactor: a nuclear reactor that uses water as a coolant and moderator; the steam produced can drive a steam turbine


PWR: a nuclear reactor that uses water as a coolant and moderator; the steam produced can drive a steam turbine


pressure suit: protective garment consisting of an inflatable suit for space or high altitude flying


preventive: remedy that prevents or slows the course of an illness or disease


preventative: remedy that prevents or slows the course of an illness or disease


prophylactic: remedy that prevents or slows the course of an illness or disease


pricket: a sharp metal spike to hold a candle


prie-dieu: low bench for kneeling on


primaquine: synthetic antimalarial drug


Primaxin: trade name for a parenteral antibiotic


primary coil: coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit


primary winding: coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit


primary: coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit


primidone: an anticonvulsant (trade name Mysoline) used to treat grand mal seizures and essential tremor


Mysoline: an anticonvulsant (trade name Mysoline) used to treat grand mal seizures and essential tremor


primitivism: a genre characteristic of (or imitative of) primitive artists or children


Primus stove: a portable paraffin cooking stove; used by campers


Primus: a portable paraffin cooking stove; used by campers


Prince Albert: a man's double-breasted frock coat


Princeton University: a university in New Jersey


Princeton: a university in New Jersey


print: a picture or design printed from an engraving


print: a fabric with a dyed pattern pressed onto it (usually by engraved rollers)


print: a copy of a movie on film (especially a particular version of it)


print buffer: a buffer that stores data until the printer is ready


printed circuit: computer circuit consisting of an electronic sub-assembly; copper conductors are laminated on an insulating board or card and circuit components are inserted into holes and dip soldered


printer: a machine that prints


printing machine: a machine that prints


printer: (computer science) an output device that prints the results of data processing


printer cable: a cable between a computer and a printer


print shop: a workplace where printing is done


printing shop: a workplace where printing is done


priory: religious residence in a monastery governed by a prior or a convent governed by a prioress


prism: optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image


optical prism: optical device having a triangular shape and made of glass or quartz; used to deviate a beam or invert an image


prison: a correctional institution where persons are confined while on trial or for punishment


prison house: a correctional institution where persons are confined while on trial or for punishment


prison camp: a camp for prisoners of war


internment camp: a camp for prisoners of war


prisoner of war camp: a camp for prisoners of war


POW camp: a camp for prisoners of war


privateer: a privately owned warship commissioned to prey on the commercial shipping or warships of an enemy nation


private line: a telephone line serving a single subscriber


privet hedge: hedge of privet plants


probe: a flexible slender surgical instrument with a blunt end that is used to explore wounds or body cavities


probenecid: a uricosuric drug that reduces the level of uric acid in the blood; used to treat gout


procaine: a white crystalline powder (trade name Ethocaine) administered near nerves as a local anesthetic in dentistry and medicine


Ethocaine: a white crystalline powder (trade name Ethocaine) administered near nerves as a local anesthetic in dentistry and medicine


procaine hydrochloride: procaine administered as a hydrochloride (trade name Novocain)


novocaine: procaine administered as a hydrochloride (trade name Novocain)


Novocain: procaine administered as a hydrochloride (trade name Novocain)


procarbazine: an antineoplastic drug used to treat Hodgkin's disease


prochlorperazine: antipsychotic and antiemetic drug used to treat schizophrenia and to combat nausea and vomiting


proctoscope: an endoscope for examining the rectum


procyclidine: drug (trade name Kemadrin) used to reduce tremors in Parkinsonism


Kemadrin: drug (trade name Kemadrin) used to reduce tremors in Parkinsonism


prod: a pointed instrument that is used to prod into a state of motion


goad: a pointed instrument that is used to prod into a state of motion


product: an artifact that has been created by someone or some process


production: an artifact that has been created by someone or some process


production line: mechanical system in a factory whereby an article is conveyed through sites at which successive operations are performed on it


assembly line: mechanical system in a factory whereby an article is conveyed through sites at which successive operations are performed on it


line: mechanical system in a factory whereby an article is conveyed through sites at which successive operations are performed on it


projectile: a weapon that is forcibly thrown or projected at a targets but is not self-propelled


missile: a weapon that is forcibly thrown or projected at a targets but is not self-propelled


projection: any structure that branches out from a central support


projection: the representation of a figure or solid on a plane as it would look from a particular direction


projector: an optical instrument that projects an enlarged image onto a screen


projector: an optical device for projecting a beam of light


prolonge: a rope fitted with a hook and used for towing a gun carriage


prolonge knot: a knot in the rope used to drag a gun carriage


sailor's breastplate: a knot in the rope used to drag a gun carriage


promenade: a public area set aside as a pedestrian walk


mall: a public area set aside as a pedestrian walk


promethazine: antihistamine (trade name Phenergan) used to treat allergies; also an antiemetic used to treat motion sickness


Phenergan: antihistamine (trade name Phenergan) used to treat allergies; also an antiemetic used to treat motion sickness


prompt box: a booth projecting above the floor in the front of a stage where the prompter sits; opens toward the performers on stage


prompter's box: a booth projecting above the floor in the front of a stage where the prompter sits; opens toward the performers on stage


prompter: a device that displays words for people to read


autocue: a device that displays words for people to read


prong: a pointed projection


proof: a trial photographic print from a negative


prop: a support placed beneath or against something to keep it from shaking or falling


propanolol: the first beta blocker (trade name Inderal) used in treating hypertension and angina pectoris and essential tremor


Inderal: the first beta blocker (trade name Inderal) used in treating hypertension and angina pectoris and essential tremor


propellant explosive: an explosive that is used to propel projectiles from guns or to propel rockets and missiles or to launch torpedos and depth charges


impulse explosive: an explosive that is used to propel projectiles from guns or to propel rockets and missiles or to launch torpedos and depth charges


propeller: a mechanical device that rotates to push against air or water


propellor: a mechanical device that rotates to push against air or water


propeller plane: an airplane that is driven by a propeller


property: any movable articles or objects used on the set of a play or movie


prop: any movable articles or objects used on the set of a play or movie


propjet: an airplane with an external propeller that is driven by a turbojet engine


turboprop: an airplane with an external propeller that is driven by a turbojet engine


turbo-propeller plane: an airplane with an external propeller that is driven by a turbojet engine


proportional counter tube: counter tube whose output pulse is proportional to number of ions produced


proportional counter: counter tube whose output pulse is proportional to number of ions produced


propoxyphene: a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive


propoxyphene hydrochloride: a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive


Darvon: a mildly narcotic analgesic drug (trade name Darvon) related to methadone but less addictive


propulsion system: a system that provides a propelling or driving force


proscenium: the wall that separates the stage from the auditorium in a modern theater


proscenium wall: the wall that separates the stage from the auditorium in a modern theater


proscenium: the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain)


apron: the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain)


forestage: the part of a modern theater stage between the curtain and the orchestra (i.e., in front of the curtain)


proscenium arch: the arch over the opening in the proscenium wall


prosthesis: corrective consisting of a replacement for a part of the body


prosthetic device: corrective consisting of a replacement for a part of the body


protease inhibitor: an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs


PI: an antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs


protective covering: a covering that is intend to protect from damage or injury


protective cover: a covering that is intend to protect from damage or injury


protection: a covering that is intend to protect from damage or injury


protective garment: clothing that is intended to protect the wearer from injury


proteosome vaccine: a form of vaccine that can be administered by an inhaler


proteosome: a form of vaccine that can be administered by an inhaler


proton accelerator: a collider that collides beams of protons and antiprotons


protractor: drafting instrument used to draw or measure angles


protriptyline: tricyclic antidepressant used to treat clinical depression


proving ground: a workplace for testing new equipment or ideas


pruner: a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees


pruning hook: a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees


lopper: a long-handled pruning saw with a curved blade at the end and sometimes a clipper; used to prune small trees


pruning knife: a knife with a curved or hooked blade


pruning saw: a handsaw used for pruning trees


pruning shears: shears with strong blades used for light pruning of woody plants


psaltery: an ancient stringed instrument similar to the lyre or zither but having a trapezoidal sounding board under the strings


psilocybin: a hallucinogenic compound obtained from a mushroom


psilocin: a hallucinogenic compound obtained from a mushroom


psychoactive drug: a drug that can produce mood changes and distorted perceptions


mind-altering drug: a drug that can produce mood changes and distorted perceptions


consciousness-altering drug: a drug that can produce mood changes and distorted perceptions


psychoactive substance: a drug that can produce mood changes and distorted perceptions


psychotropic agent: a chemical substance that can influence human consciousness


psychrometer: a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air


PT boat: a small fast unarmored and lightly armed torpedo boat; P(atrol) T(orpedo) boat


mosquito boat: a small fast unarmored and lightly armed torpedo boat; P(atrol) T(orpedo) boat


mosquito craft: a small fast unarmored and lightly armed torpedo boat; P(atrol) T(orpedo) boat


motor torpedo boat: a small fast unarmored and lightly armed torpedo boat; P(atrol) T(orpedo) boat


p-type semiconductor: a semiconductor in which electrical conduction is due chiefly to the movement of positive holes


public address system: an electronic amplification system used as a communication system in public areas


P.A. system: an electronic amplification system used as a communication system in public areas


PA system: an electronic amplification system used as a communication system in public areas


P.A.: an electronic amplification system used as a communication system in public areas


PA: an electronic amplification system used as a communication system in public areas


public house: tavern consisting of a building with a bar and public rooms; often provides light meals


pub: tavern consisting of a building with a bar and public rooms; often provides light meals


saloon: tavern consisting of a building with a bar and public rooms; often provides light meals


pothouse: tavern consisting of a building with a bar and public rooms; often provides light meals


gin mill: tavern consisting of a building with a bar and public rooms; often provides light meals


taphouse: tavern consisting of a building with a bar and public rooms; often provides light meals


public toilet: a toilet that is available to the public


comfort station: a toilet that is available to the public


public convenience: a toilet that is available to the public


convenience: a toilet that is available to the public


public lavatory: a toilet that is available to the public


restroom: a toilet that is available to the public


toilet facility: a toilet that is available to the public


wash room: a toilet that is available to the public


public transit: a public transportation system for moving passengers


public transport: conveyance for passengers or mail or freight


public works: structures (such as highways or schools or bridges or docks) constructed at government expense for public use


puck: a vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey


hockey puck: a vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey


pull: a device used for pulling something


pullback: a device (as a decorative loop of cord or fabric) for holding or drawing something back


tieback: a device (as a decorative loop of cord or fabric) for holding or drawing something back


pull chain: a chain (usually with a handle at the end) that is pulled in order to operate some mechanism (e.g. to flush a toilet)


pulley: a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope


pulley-block: a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope


pulley block: a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope


block: a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope


pull-in: a roadside cafe especially for lorry drivers


pull-up: a roadside cafe especially for lorry drivers


pull-off: designated paved area beside a main road where cars can stop temporarily


rest area: designated paved area beside a main road where cars can stop temporarily


rest stop: designated paved area beside a main road where cars can stop temporarily


layby: designated paved area beside a main road where cars can stop temporarily


lay-by: designated paved area beside a main road where cars can stop temporarily


Pullman: luxurious passenger car; for day or night travel


Pullman car: luxurious passenger car; for day or night travel


pullover: a sweater that is put on by pulling it over the head


slipover: a sweater that is put on by pulling it over the head


pull-through: cleaning implement consisting of an oily rag attached by a cord to a weight; is pulled through the barrel of a rifle or handgun to clean it


pulse counter: an electronic counter that counts the number of electric pulses


pulse generator: a generator of single or multiple voltage pulses; usually adjustable for pulse rate


pulse timing circuit: a circuit that times pulses


pump: a mechanical device that moves fluid or gas by pressure or suction


pump: a low-cut shoe without fastenings


pump action: action mechanism in a modern rifle or shotgun; a back and forward motion of a sliding lever ejects the empty shell case and cocks the firearm and loads a new round


slide action: action mechanism in a modern rifle or shotgun; a back and forward motion of a sliding lever ejects the empty shell case and cocks the firearm and loads a new round


pump house: a house where pumps (e.g. to irrigate) are installed and operated


pumping station: a house where pumps (e.g. to irrigate) are installed and operated


pump room: a pump house at a spa where medicinal waters are pumped and where patrons gather


pump-type pliers: a type of pliers


pump well: an enclosure in the middle of a ship's hold that protects the ship's pumps


punch: a tool for making holes or indentations


puncher: a tool for making holes or indentations


punchboard: a small board full of holes; each hole contains a slip of paper with symbols printed on it; a gambler pays a small sum for the privilege of pushing out a slip in the hope of obtaining one that entitles him to a prize


punch bowl: a large bowl for serving beverages; usually with a ladle


punched card: a card on which data can be recorded in the form of punched holes


punch card: a card on which data can be recorded in the form of punched holes


Hollerith card: a card on which data can be recorded in the form of punched holes


punching bag: an inflated ball or bag that is suspended and punched for training in boxing


punch bag: an inflated ball or bag that is suspended and punched for training in boxing


punching ball: an inflated ball or bag that is suspended and punched for training in boxing


punchball: an inflated ball or bag that is suspended and punched for training in boxing


punch pliers: punch consisting of pliers for perforating paper or leather


punch press: a power driven press used to shape metal parts


puncture: a small hole made by a sharp object


pung: a one-horse sleigh consisting of a box on runners


punkah: a large fan consisting of a frame covered with canvas that is suspended from the ceiling; used in India for circulating air in a room


punnet: a small light basket used as a measure for fruits


punt: an open flat-bottomed boat used in shallow waters and propelled by a long pole


puppet: a doll with a hollow head of a person or animal and a cloth body; intended to fit over the hand and be manipulated with the fingers


puppet: a small figure of a person operated from above with strings by a puppeteer


marionette: a small figure of a person operated from above with strings by a puppeteer


pup tent: a wedge-shaped tent; usually without a floor or windows


shelter tent: a wedge-shaped tent; usually without a floor or windows


purdah: a screen used in India to separate women from men or strangers


purgative: a purging medicine; stimulates evacuation of the bowels


cathartic: a purging medicine; stimulates evacuation of the bowels


physic: a purging medicine; stimulates evacuation of the bowels


aperient: a purging medicine; stimulates evacuation of the bowels


purifier: an apparatus for removing impurities


purl: a basic knitting stitch


purl stitch: a basic knitting stitch


purl: gold or silver wire thread


purse: a small bag for carrying money


purse seine: a seine designed to be set by two boats around a school of fish and then closed at the bottom by means of a line


purse string: a drawstring used to close the mouth of a purse


push-bike: a bicycle that must be pedaled


push broom: a wide broom that is pushed ahead of the sweeper


push button: an electrical switch operated by pressing


push: an electrical switch operated by pressing


button: an electrical switch operated by pressing


push-button radio: a radio receiver that can be tuned by pressing buttons


push-down storage: a storage device that handles data so that the next item to be retrieved is the item most recently stored (LIFO)


push-down store: a storage device that handles data so that the next item to be retrieved is the item most recently stored (LIFO)


stack: a storage device that handles data so that the next item to be retrieved is the item most recently stored (LIFO)


pusher: a sandal attached to the foot by a thong over the toes


zori: a sandal attached to the foot by a thong over the toes


put-put: a small gasoline engine (as on motor boat)


puttee: a strip of cloth wound around the leg to form legging; used by soldiers in World War I


putter: the iron normally used on the putting green


putting iron: the iron normally used on the putting green


putty knife: a spatula used to mix or apply putty


puzzle: a game that tests your ingenuity


pyelogram: an X ray of the kidneys and ureters


pylon: a large vertical steel tower supporting high-tension power lines


power pylon: a large vertical steel tower supporting high-tension power lines


pylon: a tower for guiding pilots or marking the turning point in a race


pyocyanase: a yellow-green mixture of antibiotics obtained from the bacillus of green pus


pyocyanin: a toxic blue crystalline antibiotic found in green pus


Pyramid: a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt


Great Pyramid: a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt


Pyramids of Egypt: a massive monument with a square base and four triangular sides; begun by Cheops around 2700 BC as royal tombs in ancient Egypt


pyramidal tent: a large tent shaped like a pyramid; can hold half a dozen people


pyrilamine: antihistamine used to treat rhinitis and pruritus


pyrograph: a design produced by pyrography


pyrometer: a thermometer designed to measure high temperatures


pyrometric cone: a pyrometer consisting of a series of cones that melt at different temperatures


pyrostat: a thermostat that operates at very high temperatures


pyx: any receptacle in which wafers for the Eucharist are kept


pix: any receptacle in which wafers for the Eucharist are kept


pyx: a chest in which coins from the mint are held to await assay


pix: a chest in which coins from the mint are held to await assay


pyx chest: a chest in which coins from the mint are held to await assay


pix chest: a chest in which coins from the mint are held to await assay


pyxis: a small box used by ancient Greeks to hold medicines


quad: a rectangular area surrounded on all sides by buildings


quadrangle: a rectangular area surrounded on all sides by buildings


quad: (printing) a block of type without a raised letter; used for spacing between words or sentences


space: (printing) a block of type without a raised letter; used for spacing between words or sentences


quadrant: a measuring instrument for measuring altitude of heavenly bodies


quadraphony: a stereophonic sound recording or reproducing system using four separate channels


quadraphonic system: a stereophonic sound recording or reproducing system using four separate channels


quadriphonic system: a stereophonic sound recording or reproducing system using four separate channels


quadruplicate: any four copies; any of four things that correspond to one another exactly


Quaker gun: a dummy gun or piece of artillery made usually of wood


quarrel: an arrow that is shot from a crossbow; has a head with four edges


quarter: piece of leather that comprises the part of a shoe or boot covering the heel and joining the vamp


quarterdeck: the stern area of a ship's upper deck


quartering: living accommodations (especially those assigned to military personnel)


quartering: a coat of arms that occupies one quarter of an escutcheon; combining four coats of arms on one shield usually represented intermarriages


quarterlight: car window consisting of a small pivoted glass vent in the door of a car


quarter plate: a photographic plate measuring 3.25 inches by 4.25 inches


quarterstaff: a long stout staff used as a weapon


quartz battery: a stamp mill for stamping quartz


quartz mill: a stamp mill for stamping quartz


quartz crystal: a thin plate or small rod of quartz cut along certain lines and ground so that it can produce an electric signal at a constant frequency; used in crystal oscillators


quartz lamp: a mercury-vapor lamp that is enclosed in a quartz container instead of a glass container


quay: wharf usually built parallel to the shoreline


Quebec Bridge: a cantilever bridge in Quebec


queen: (chess) the most powerful piece


queen: one of four face cards in a deck bearing a picture of a queen


queen post: vertical tie post in a roof truss


Queensboro Bridge: a cantilever bridge across the East River between Manhattan and Queens


quern: a primitive stone mill for grinding corn by hand


quill: pen made from a bird's feather


quill pen: pen made from a bird's feather


quilt: bedding made of two layers of cloth filled with stuffing and stitched together


comforter: bedding made of two layers of cloth filled with stuffing and stitched together


comfort: bedding made of two layers of cloth filled with stuffing and stitched together


puff: bedding made of two layers of cloth filled with stuffing and stitched together


quilted bedspread: a bedspread constructed like a thin quilt


quilting: a material used for making a quilt, or a quilted fabric


quilting: stitching through layers of fabric and a filling so as to create a design


quinacrine: a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria


quinacrine hydrochloride: a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria


mepacrine: a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria


Atabrine: a drug (trade name Atabrine) used to treat certain worm infestations and once used to treat malaria


quinidine: cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias


Quinidex: cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias


Quinora: cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias


quinine: a bitter alkaloid extracted from chinchona bark; used in malaria therapy


quipu: calculator consisting of a cord with attached cords; used by ancient Peruvians for calculating and keeping records


quirk: a narrow groove beside a beading


quirk bead: beading formed with a narrow groove separating it from the surface it decorates


bead and quirk: beading formed with a narrow groove separating it from the surface it decorates


quirk molding: a molding having a small groove in it


quirk moulding: a molding having a small groove in it


quirt: whip with a leather thong at the end


quiver: case for holding arrows


quoin: the keystone of an arch


coign: the keystone of an arch


coigne: the keystone of an arch


quoin: expandable metal or wooden wedge used by printers to lock up a form within a chase


coign: expandable metal or wooden wedge used by printers to lock up a form within a chase


coigne: expandable metal or wooden wedge used by printers to lock up a form within a chase


quoit: game equipment consisting of a ring of iron or circle of rope used in playing the game of quoits


QWERTY keyboard: the standard typewriter keyboard; the keys for Q, W, E, R, T, and Y are the first six from the left on the top row of letter keys


R-2: street names for flunitrazepan


Mexican valium: street names for flunitrazepan


rophy: street names for flunitrazepan


rope: street names for flunitrazepan


roofy: street names for flunitrazepan


roach: street names for flunitrazepan


forget me drug: street names for flunitrazepan


circle: street names for flunitrazepan


rabato: a wired or starched collar of intricate lace; worn in 17th century


rebato: a wired or starched collar of intricate lace; worn in 17th century


rabbet: a rectangular groove made to hold two pieces together


rebate: a rectangular groove made to hold two pieces together


rabbet joint: a joint formed by fitting together two rabbeted boards


rabbit ears: an indoor TV antenna; consists of two extendible rods that form a V


rabbit hutch: a hutch for rabbits


raceabout: a small sloop having the keep of a knockabout but with finer lines and carrying more sail


racer: a fast car that competes in races


race car: a fast car that competes in races


racing car: a fast car that competes in races


racetrack: a course over which races are run


racecourse: a course over which races are run


raceway: a course over which races are run


track: a course over which races are run


raceway: a canal for a current of water


race: a canal for a current of water


racing boat: a boat propelled by oarsmen and designed for racing


racing circuit: a racetrack for automobile races


circuit: a racetrack for automobile races


racing gig: a light narrow racing boat for two or more oarsmen


racing skiff: a shell for a single oarsman


single shell: a shell for a single oarsman


rack: a support for displaying various articles


stand: a support for displaying various articles


rack: framework for holding objects


rack: an instrument of torture that stretches or disjoints or mutilates victims


wheel: an instrument of torture that stretches or disjoints or mutilates victims


rack and pinion: a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa)


racket: a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games


racquet: a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games


racquetball: the ball used in playing the game of racquetball


radar: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects


microwave radar: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects


radio detection and ranging: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects


radiolocation: measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects


radial: pneumatic tire that has radial-ply casing


radial tire: pneumatic tire that has radial-ply casing


radial-ply tire: pneumatic tire that has radial-ply casing


radial engine: an internal-combustion engine having cylinders arranged radially around a central crankcase


rotary engine: an internal-combustion engine having cylinders arranged radially around a central crankcase


radiation pyrometer: a pyrometer for estimating the temperature of distant sources of heat; radiation is focussed on a thermojunction connected in circuit with a galvanometer


radiator: a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan


radiator: heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings


radiator cap: cap on the opening in the top of a radiator through which a coolant liquid can be added


radiator hose: a flexible hose between the radiator and the engine block


radio: a communication system based on broadcasting electromagnetic waves


wireless: a communication system based on broadcasting electromagnetic waves


radio antenna: omnidirectional antenna comprising the part of a radio receiver by means of which radio signals are received


radio aerial: omnidirectional antenna comprising the part of a radio receiver by means of which radio signals are received


radio beacon: a radio station that broadcasts a directional signal for navigational purposes


beacon: a radio station that broadcasts a directional signal for navigational purposes


radio chassis: a chassis for a radio receiver


radio compass: a direction finder that gives a bearing by determining the direction of incoming radio signals


radiogram: a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)


radiograph: a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)


shadowgraph: a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)


skiagraph: a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)


skiagram: a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays)


radio interferometer: radio telescope that uses interference patterns from two antennas instead of a parabolic antenna


radio link: a two-way radio communication system (usually microwave); part of a more extensive telecommunication network


link: a two-way radio communication system (usually microwave); part of a more extensive telecommunication network


radiometer: meter to detect and measure radiant energy (electromagnetic or acoustic)


radiomicrometer: radiometer that is extremely sensitive


radiopharmaceutical: pharmaceutical consisting of a radioactive compound used in radiation therapy


radio-phonograph: electronic equipment consisting of a combination of a radio receiver and a record player


radio-gramophone: electronic equipment consisting of a combination of a radio receiver and a record player


radiophotograph: a photograph transmitted by radio waves


radiophoto: a photograph transmitted by radio waves


radio receiver: an electronic receiver that detects and demodulates and amplifies transmitted signals


receiving set: an electronic receiver that detects and demodulates and amplifies transmitted signals


radio set: an electronic receiver that detects and demodulates and amplifies transmitted signals


radio: an electronic receiver that detects and demodulates and amplifies transmitted signals


tuner: an electronic receiver that detects and demodulates and amplifies transmitted signals


wireless: an electronic receiver that detects and demodulates and amplifies transmitted signals


radio station: station for the production and transmission of AM or FM radio broadcasts


radiotelegraph: the use of radio to send telegraphic messages (usually by Morse code)


radiotelegraphy: the use of radio to send telegraphic messages (usually by Morse code)


wireless telegraph: the use of radio to send telegraphic messages (usually by Morse code)


wireless telegraphy: the use of radio to send telegraphic messages (usually by Morse code)


radiotelephone: a telephone that communicates by radio waves rather than along cables


radiophone: a telephone that communicates by radio waves rather than along cables


wireless telephone: a telephone that communicates by radio waves rather than along cables


radio telescope: astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources


radio reflector: astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources


radiotherapy equipment: equipment used to treat diseases with x-rays or radioactivity


radio transmitter: transmitter that is the part of a radio system that transmits signals


radome: a housing for a radar antenna; transparent to radio waves


radar dome: a housing for a radar antenna; transparent to radio waves


raft: a flat float (usually made of logs or planks) that can be used for transport or as a platform for swimmers


rafter: one of several parallel sloping beams that support a roof


balk: one of several parallel sloping beams that support a roof


baulk: one of several parallel sloping beams that support a roof


raft foundation: a foundation (usually on soft ground) consisting of an extended layer of reinforced concrete


rag: a small piece of cloth or paper


shred: a small piece of cloth or paper


tag: a small piece of cloth or paper


tag end: a small piece of cloth or paper


tatter: a small piece of cloth or paper


ragbag: a bag in which rags are kept


rag doll: a cloth doll that is stuffed and (usually) painted


raglan: a garment (coat or sweater) that has raglan sleeves


raglan sleeve: a sleeve that extends in one piece to the neckline of a coat or sweater with seams from the armhole to the neck


rail: a horizontal bar (usually of wood or metal)


rail: short for railway


rail fence: a fence (usually made of split logs laid across each other at an angle)


railhead: a railroad depot in a theater of operations where military supplies are unloaded for distribution


railhead: the end of the completed track on an unfinished railway


railing: a barrier consisting of a horizontal bar and supports


rail: a barrier consisting of a horizontal bar and supports


railing: material for making rails or rails collectively


railroad bed: a bed on which railroad track is laid


railroad flat: an apartment whose rooms are all in a line with doors between them


railroad track: a line of track providing a runway for wheels


railroad: a line of track providing a runway for wheels


railway: a line of track providing a runway for wheels


railroad tunnel: a tunnel through which the railroad track runs


railway: line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight


railroad: line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight


railroad line: line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight


railway line: line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight


railway system: line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight


railway junction: a junction where two or more railway lines meet or cross


railway station: terminal where trains load or unload passengers or goods


railroad station: terminal where trains load or unload passengers or goods


railroad terminal: terminal where trains load or unload passengers or goods


train station: terminal where trains load or unload passengers or goods


train depot: terminal where trains load or unload passengers or goods


rain barrel: a barrel used as a cistern to hold rainwater


raincoat: a water-resistant coat


waterproof: a water-resistant coat


rain gauge: gauge consisting of an instrument to measure the quantity of precipitation


rain gage: gauge consisting of an instrument to measure the quantity of precipitation


pluviometer: gauge consisting of an instrument to measure the quantity of precipitation


udometer: gauge consisting of an instrument to measure the quantity of precipitation


rain stick: a percussion instrument that is made from a dried cactus branch that is hollowed out and filled with small pebbles and capped at both ends; makes the sound of falling rain when tilted; origin was in Chile where tribesmen used it in ceremonies to bring rain


rake: a long-handled tool with a row of teeth at its head; used to move leaves or loosen soil


rake handle: the handle of a rake


ram: a tool for driving or forcing something by impact


RAM disk: (computer science) a virtual drive that is created by setting aside part of the random-access memory to use as if it were a group of sectors


ramekin: a small fireproof dish used for baking and serving individual portions


ramequin: a small fireproof dish used for baking and serving individual portions


ramipril: an ACE inhibitor (trade name Altace) used to treat high blood pressure or in some patients who have had a heart attack


Altace: an ACE inhibitor (trade name Altace) used to treat high blood pressure or in some patients who have had a heart attack


ramjet: a simple type of jet engine; must be launched at high speed


ramjet engine: a simple type of jet engine; must be launched at high speed


atherodyde: a simple type of jet engine; must be launched at high speed


athodyd: a simple type of jet engine; must be launched at high speed


flying drainpipe: a simple type of jet engine; must be launched at high speed


rammer: a tool for driving something with force


ramp: an inclined surface connecting two levels


incline: an inclined surface connecting two levels


rampant arch: an arch whose support is higher on one side than on the other


rampart: an embankment built around a space for defensive purposes


bulwark: an embankment built around a space for defensive purposes


wall: an embankment built around a space for defensive purposes


ramrod: a rod used to ram the charge into a muzzle-loading firearm


ramrod: a rod used to clean the barrel of a firearm


ranch: farm consisting of a large tract of land along with facilities needed to raise livestock (especially cattle)


spread: farm consisting of a large tract of land along with facilities needed to raise livestock (especially cattle)


cattle ranch: farm consisting of a large tract of land along with facilities needed to raise livestock (especially cattle)


cattle farm: farm consisting of a large tract of land along with facilities needed to raise livestock (especially cattle)


ranch house: a one story house with a low pitched roof


random-access memory: the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible


random access memory: the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible


random memory: the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible


RAM: the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible