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

Tubivalve :: Tubivalve (n.) A shell or tube formed by an annelid, as a serpula..
Mactra :: Mactra (n.) Any marine bivalve shell of the genus Mactra, and allied genera. Many species are known. Some of them are used as food, as Mactra stultorum, of Europe. See Surf clam, under Surf..
Holostraca :: Holostraca (n. pl.) A division of phyllopod Crustacea, including those that are entirely covered by a bivalve shell..
Mya :: Mya (n.) A genus of bivalve mollusks, including the common long, or soft-shelled, clam..
Stopcock :: Stopcock (n.) A bib, faucet, or short pipe, fitted with a turning stopper or plug for permitting or restraining the flow of a liquid or gas; a cock or valve for checking or regulating the flow of water, gas, etc., through or from a pipe, etc..
Solenacean :: Solenacean (n.) Any species of marine bivalve shells belonging to the family Solenidae.
Silique :: Silique (n.) An oblong or elongated seed vessel, consisting of two valves with a dissepiment between, and opening by sutures at either margin. The seeds are attached to both edges of the dissepiment, alternately upon each side of it..
Blow Valve :: Blow valve () See Snifting valve.
Multivalvular :: Multivalvular (a.) Many-valved; having more than two valves; -- said of certain shells, as the chitons..
Mytilus :: Mytilus (n.) A genus of marine bivalve shells, including the common mussel. See Illust. under Byssus..
Conchifera :: Conchifera (n. pl.) That class of Mollusca which includes the bivalve shells; the Lamellibranchiata. See Mollusca.
Sucker :: Sucker (n.) The embolus, or bucket, of a pump; also, the valve of a pump basket..
Avicula :: Avicula (n.) A genus of marine bivalves, having a pearly interior, allied to the pearl oyster; -- so called from a supposed resemblance of the typical species to a bird..
Bivalvular :: Bivalvular (a.) Having two valves.
Nucula :: Nucula (n.) A genus of small marine bivalve shells, having a pearly interior..
Siphon :: Siphon (n.) One of the tubes or folds of the mantle border of a bivalve or gastropod mollusk by which water is conducted into the gill cavity. See Illust. under Mya, and Lamellibranchiata..
Spanner :: Spanner (n.) A contrivance in some of the ealier steam engines for moving the valves for the alternate admission and shutting off of the steam.
Beak :: Beak (n.) The prolongation of certain univalve shells containing the canal.
Helicoid :: Helicoid (a.) Spiral; curved, like the spire of a univalve shell..
Xylophaga :: Xylophaga (n.) A genus of marine bivalves which bore holes in wood. They are allied to Pholas.
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