Definition of valve

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Valve (n.) 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 retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves..

Lern More About Valve

Wedge-shell :: Wedge-shell (n.) Any one of numerous species of small marine bivalves belonging to Donax and allied genera in which the shell is wedge-shaped.
Plate-gilled :: Plate-gilled (a.) Having flat, or leaflike, gills, as the bivalve mollusks..
Asiphonate :: Asiphonate (a.) Destitute of a siphon or breathing tube; -- said of many bivalve shells.
Borer :: Borer (n.) Any bivalve mollusk (Saxicava, Lithodomus, etc.) which bores into limestone and similar substances..
Lead :: Lead (n.) The width of port opening which is uncovered by the valve, for the admission or release of steam, at the instant when the piston is at end of its stroke..
Lithophagous :: Lithophagous (a.) Eating or destroying stone; -- applied to various animals which make burrows in stone, as many bivalve mollusks, certain sponges, annelids, and sea urchins. See Lithodomus..
Frustule :: Frustule (n.) The siliceous shell of a diatom. It is composed of two valves, one overlapping the other, like a pill box and its cover..
Dashpot :: Dashpot (n.) A pneumatic or hydraulic cushion for a falling weight, as in the valve gear of a steam engine, to prevent shock..
Inequivalvular :: Inequivalvular (a.) Having unequal valves, as the shell of an oyster..
Handwheel :: Handwheel (n.) Any wheel worked by hand; esp., one the rim of which serves as the handle by which a valve, car brake, or other part is adjusted..
Valvular :: Valvular (a.) Of or pertaining to a valve or valves; specifically (Med.), of or pertaining to the valves of the heart; as, valvular disease..
Ileocolic :: Ileocolic (a.) Pertaining to the ileum and colon; as, the ileocolic, or ileocaecal, valve, a valve where the ileum opens into the large intestine..
Tubivalve :: Tubivalve (n.) A shell or tube formed by an annelid, as a serpula..
Nucula :: Nucula (n.) A genus of small marine bivalve shells, having a pearly interior..
Lip :: Lip (n.) One of the edges of the aperture of a univalve shell.
Replum :: Replum (n.) The framework of some pods, as the cress, which remains after the valves drop off..
Boat Shell :: Boat shell () A marine univalve shell of the genus Cymba.
Heteromyaria :: Heteromyaria (n. pl.) A division of bivalve shells, including the marine mussels, in which the two adductor muscles are very unequal. See Dreissena, and Illust. under Byssus..
Equivalved :: Equivalved (a.) Having the valves equal in size and from, as in most bivalve shells..
Pallet :: Pallet (n.) One of a pair of shelly plates that protect the siphon tubes of certain bivalves, as the Teredo. See Illust. of Teredo..
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