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Bivalve :: Bivalve (n.) A mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, -- or by one, as in the oyster. See Mollusca..

Anomia :: Anomia (n.) A genus of bivalve shells, allied to the oyster, so called from their unequal valves, of which the lower is perforated for attachment..

Bimuscular :: Bimuscular (a.) Having two adductor muscles, as a bivalve mollusk..

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

Intracolic :: Intracolic (a.) Within the colon; as, the intracolic valve..

Cardo :: Cardo (n.) The hinge of a bivalve shell.

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

Travel :: Travel (n.) The length of stroke of a reciprocating piece; as, the travel of a slide valve..

Conchoidal :: Conchoidal (a.) Having elevations or depressions in form like one half of a bivalve shell; -- applied principally to a surface produced by fracture.

Bellows :: Bellows (n. sing. & pl.) An instrument, utensil, or machine, which, by alternate expansion and contraction, or by rise and fall of the top, draws in air through a valve and expels it through a tube for various purposes, as blowing fires, ventilating mines, or filling the pipes of an organ with wind..

Naiad :: Naiad (n.) Any species of a tribe (Naiades) of freshwater bivalves, including Unio, Anodonta, and numerous allied genera; a river mussel..

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

Abalone :: Abalone (n.) A univalve mollusk of the genus Haliotis. The shell is lined with mother-of-pearl, and used for ornamental purposes; the sea-ear. Several large species are found on the coast of California, clinging closely to the rocks..

Spat :: Spat (n.) A young oyster or other bivalve mollusk, both before and after it first becomes adherent, or such young, collectively..

Acephala :: Acephala (n. pl.) That division of the Mollusca which includes the bivalve shells, like the clams and oysters; -- so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca..

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

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.

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

Holostraca :: Holostraca (n. pl.) A division of phyllopod Crustacea, including those that are entirely covered by a bivalve shell..

Pinna :: Pinna (n.) Any species of Pinna, a genus of large bivalve mollusks found in all warm seas. The byssus consists of a large number of long, silky fibers, which have been used in manufacturing woven fabrics, as a curiosity..

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