Access our complete rankings of Best Graduate Schools. Tags: graduate schools, education, rankings, business school, MBAs, law school, medical school, engineering graduate school, education graduate school, nursing programs, STEM education. Ilana Kowarski | April 20, 2017.
Gravel(noun) small stones, or fragments of stone; very small pebbles, often intermixed with particles of sand. Gravel(noun) a deposit of small calculous concretions in the kidneys and the urinary or gall bladder; also, the disease of which they are a symptom. Gravel(verb) to cover with gravel; as, to gravel a walk.
Gravel is used extensively in building roads and in making concrete. For road building it is crushed into angular particles of uniform size. One or more layers of gravel underlie the road surface. A small percentage of clay must be present to act as a binder when gravel is used in macadam for road surfaces.