valve
/ˈvælv/ noun, verb
Forms valves valving valved
- noun A device that controls the flow of a gas or fluid through a space, such as a pipe, manifold, or plenum. “open the valve”
- noun Such a device that admits fuel and air into the cylinder of an internal combustion engine, or one that allows combustion gases to exit. “In nearly all internal combustion engines, the valves are of the poppet type.”
- noun (anatomy) One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or control the flow in the opposite direction. “the ileocecal valve”
- noun One of the leaves of a folding door or of a window sash.
- noun (chiefly UK) A vacuum tube.
- noun (botany) One of the pieces into which certain fruits naturally separate when they dehisce.
- noun (botany) A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, such as in the barberry.
- noun (biology) One of the pieces or divisions of bivalve or multivalve shells.
- verb (transitive) To control (flow) by means of a valve.
Synonyms
Etymology
From Middle English valve, from Latin valva (“double door, valve”). Doublet of valva.
Webster’s 1913
- noun A door; especially, one of a pair of folding doors, or one of the leaves of such a door.
- noun A lid, plug, or cover, applied to an aperture so that by its movement, as by swinging, lifting and falling, sliding, turning, or the like, it will open or close the aperture to permit or prevent passage, as of a fluid.
Etymology [L. valva the leaf, fold, or valve of a door: cf. F. valve.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “valve”, CC BY-SA 4.0. Details