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Inoceramus :: Inoceramus (n.) An extinct genus of large, fossil, bivalve shells,allied to the mussels. The genus is characteristic of the Cretaceous period..

Varix :: Varix (n.) One of the prominent ridges or ribs extending across each of the whorls of certain univalve shells.

Cock :: Cock (n.) A faucet or valve.

Tricuspid :: Tricuspid (a.) Of or pertaining to the tricuspid valves; as, tricuspid obstruction..

Mya :: Mya (n.) A genus of bivalve mollusks, including the common long, or soft-shelled, clam..

Drill :: Drill (n.) A marine gastropod, of several species, which kills oysters and other bivalves by drilling holes through the shell. The most destructive kind is Urosalpinx cinerea..

Borer :: Borer (n.) A marine, bivalve mollusk, of the genus Teredo and allies, which burrows in wood. See Teredo..

Trochus :: Trochus (n.) Any one of numerous species of marine univalve shells belonging to Trochus and many allied genera of the family Trochidae. Some of the species are called also topshells.

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..

Septiferous :: Septiferous (a.) Bearing a partition; -- said of the valves of a capsule.

Valve :: Valve (n.) One of the pieces or divisions of bivalve or multivalve shells.

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..

Valvule :: Valvule (n.) A small valvelike process.

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..

Condenser :: Condenser (n.) An instrument for condensing air or other elastic fluids, consisting of a cylinder having a movable piston to force the air into a receiver, and a valve to prevent its escape..

Tridacna :: Tridacna (n.) A genus of very large marine bivalve shells found on the coral reefs of the Indian and Pacific Oceans. One species (T. gigas) often weighs four or five hundred pounds, and is sometimes used for baptismal fonts. Called also paw shell, and fountain shell..

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

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..

Hippurite :: Hippurite (n.) A fossil bivalve mollusk of the genus Hippurites, of many species, having a conical, cup-shaped under valve, with a flattish upper valve or lid. Hippurites are found only in the Cretaceous rocks..

Sea Cock :: Sea cock () In a steamship, a cock or valve close to the vessel's side, for closing a pipe which communicates with the sea..

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