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

Columbella :: Columbella (n.) A genus of univalve shells, abundant in tropical seas. Some species, as Columbella mercatoria, were formerly used as shell money..
Valve :: 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..
Valve :: Valve (n.) A door; especially, one of a pair of folding doors, or one of the leaves of such a door..
Lag :: Lag (n.) The amount of retardation of anything, as of a valve in a steam engine, in opening or closing..
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..
Seat :: Seat (n.) A part or surface on which another part or surface rests; as, a valve seat..
Force Pump :: Force pump () A pump having a solid piston, or plunger, for drawing and forcing a liquid, as water, through the valves; in distinction from a pump having a bucket, or valved piston..
Univalve :: Univalve (n.) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs..
Multivalve :: Multivalve (n.) Any mollusk which has a shell composed of more than two pieces.
Bivalve :: Bivalve (a.) Having two shells or valves which open and shut, as the oyster and certain seed vessels..
Beard :: Beard (n.) The gills of some bivalves, as the oyster..
Asiphonate :: Asiphonate (a.) Destitute of a siphon or breathing tube; -- said of many bivalve shells.
Ostracea :: Ostracea (n. pl.) A division of bivalve mollusks including the oysters and allied shells.
Myaria :: Myaria (n. pl.) A division of bivalve mollusks of which the common clam (Mya) is the type.
Equivalve :: Equivalve (a.) Alt. of Equivalve.
Trough-shell :: Trough-shell (n.) Any bivalve shell of the genus Mactra. See Mactra.
Typhlosole :: Typhlosole (n.) A fold of the wall which projects into the cavity of the intestine in bivalve mollusks, certain annelids, starfishes, and some other animals..
Dolium :: Dolium (n.) A genus of large univalve mollusks, including the partridge shell and tun shells..
Mussel :: Mussel (n.) Any one of many species of marine bivalve shells of the genus Mytilus, and related genera, of the family Mytidae. The common mussel (Mytilus edulis; see Illust. under Byssus), and the larger, or horse, mussel (Modiola modiolus), inhabiting the shores both of Europe and America, are edible. The former is extensively used as food in Europe..
Varix :: Varix (n.) One of the prominent ridges or ribs extending across each of the whorls of certain univalve shells.
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