plural of ball valve

plural of heart valve

plural of semilunar valve

(anatomy) Either of the two crescent-shaped valves in the heart that prevent backflow from the arteries into the ventricles.

(anatomy) A sphincter muscle valve that separates the small intestine and the large intestine. Its critical function is to limit the reflux of colonic contents into the ileum.

(anatomy) ileocecal valve

plural of overhead valve

A contrivance by which a ball, placed in a circular cup with a hole in its bottom, operates as a valve. / (proscribed) A ballcock valve.

A tapering valve which turns in a case like the plug of a faucet.

(engineering) A valve; especially one hinged at one edge, which, when raised from its seat, falls with a clacking sound.