English definition of Valve

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Definition of valve

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Valve (n.) 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..

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Xylophaga :: Xylophaga (n.) A genus of marine bivalves which bore holes in wood. They are allied to Pholas.

Nucleus :: Nucleus (n.) The tip, or earliest part, of a univalve or bivalve shell..

Valve :: Valve (n.) One of the two similar portions of the shell of a diatom.

Ganoidei :: Ganoidei (n. pl.) One of the subclasses of fishes. They have an arterial cone and bulb, spiral intestinal valve, and the optic nerves united by a chiasma. Many of the species are covered with bony plates, or with ganoid scales; others have cycloid scales..

Teredo :: Teredo (n.) A genus of long, slender, wormlike bivalve mollusks which bore into submerged wood, such as the piles of wharves, bottoms of ships, etc.; -- called also shipworm. See Shipworm. See Illust. in App..

Water Gate :: Water gate () A gate, or valve, by which a flow of water is permitted, prevented, or regulated..

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..

Throttle :: Throttle (n.) The throttle valve.

Pallial :: Pallial (a.) Of or pretaining to a mantle, especially to the mantle of mollusks; produced by the mantle; as, the pallial line, or impression, which marks the attachment of the mantle on the inner surface of a bivalve shell. See Illust. of Bivalve..

Malacobdella :: Malacobdella (n.) A genus of nemertean worms, parasitic in the gill cavity of clams and other bivalves. They have a large posterior sucker, like that of a leech. See Illust. of Bdellomorpha..

Inequivalvular :: Inequivalvular (a.) Having unequal valves, as the shell of an oyster..

Valvula :: Valvula (n.) A little valve or fold; a valvelet; a valvule.

Suprachoroid :: Suprabranchial (a.) Situated above the branchiae; -- applied especially to the upper division of the gill cavity of bivalve mollusks.

Ambitus :: Ambitus (n.) The exterior edge or border of a thing, as the border of a leaf, or the outline of a bivalve shell..

Malleus :: Malleus (n.) A genus of bivalve shells; the hammer shell.

Pecten :: Pecten (n.) Any species of bivalve mollusks of the genus Pecten, and numerous allied genera (family Pectinidae); a scallop. See Scallop..

Ostracean :: Ostracean (n.) Any one of a family of bivalves, of which the oyster is the type..

Ostracea :: Ostracea (n. pl.) A division of bivalve mollusks including the oysters and allied shells.

Pallium :: Pallium (n.) The mantle of a bivalve. See Mantle.

Peritreme :: Peritreme (n.) The edge of the aperture of a univalve shell.