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Trivalve :: Trivalve (n.) Anything having three valves, especially a shell..

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..

Univalve :: Univalve (a.) Alt. of Univalve.

Valve :: 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..

Conchifera :: Conchifera (n. pl.) That class of Mollusca which includes the bivalve shells; the Lamellibranchiata. See Mollusca.

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..

Astarte :: Astarte (n.) A genus of bivalve mollusks, common on the coasts of America and Europe..

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

Retinaculum :: Retinaculum (n.) A connecting band; a fraenum; as, the retinacula of the ileocaecal and ileocolic valves..

Box :: Box (n.) A chamber or section of tube in which a valve works; the bucket of a lifting pump.

Valve :: Valve (n.) A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, as in the barberry..

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

Eye :: Eye (n.) The scar to which the adductor muscle is attached in oysters and other bivalve shells; also, the adductor muscle itself, esp. when used as food, as in the scallop..

Goroon Shell :: Goroon shell () A large, handsome, marine, univalve shell (Triton femorale)..

Scallop :: Scallop (n.) Any one of numerous species of marine bivalve mollusks of the genus Pecten and allied genera of the family Pectinidae. The shell is usually radially ribbed, and the edge is therefore often undulated in a characteristic manner. The large adductor muscle of some the species is much used as food. One species (Vola Jacobaeus) occurs on the coast of Palestine, and its shell was formerly worn by pilgrims as a mark that they had been to the Holy Land. Called also fan shell. See Pecten, 2..

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

Discina :: Discina (n.) A genus of Branchiopoda, having a disklike shell, attached by one valve, which is perforated by the peduncle..

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..

Cockleshell :: Cockleshell (n.) One of the shells or valves of a cockle.

Mollusca :: Mollusca (n. pl.) One of the grand divisions of the animal kingdom, including the classes Cephalopoda, Gastropoda, PteropodaScaphopoda, and Lamellibranchiata, or Conchifera. These animals have an unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity. They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or m

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