Â· 43 comments. in Facts. An intelligence quotient, or IQ, is a score derived from one of several standardized tests designed to assess intelligence. The abbreviation âIQâ comes from the German term Intelligenz-Quotient, originally coined by psychologist William Stern.
Lower explosive limit. Lower explosive limit (LEL): The lowest concentration (percentage) of a gas or a vapor in air capable of producing a flash of fire in presence of an ignition source (arc, flame, heat). The term is considered by many safety professionals to be the same as the lower flammable limit (LFL).
Definition - What does Local Exchange Carrier (LEC) mean? A local exchange carrier (LEC) is the term used in the U.S. for describing the telephone company which operates within a local area and provides telecommunication services within that area. Local exchange carriers started across the U.S. following the breakup of the Bell system due to antitrust regulations.