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Tube :: Tube (n.) One of the siphons of a bivalve mollusk.

Clam :: Clam (v. t.) A bivalve mollusk of many kinds, especially those that are edible; as, the long clam (Mya arenaria), the quahog or round clam (Venus mercenaria), the sea clam or hen clam (Spisula solidissima), and other species of the United States. The name is said to have been given originally to the Tridacna gigas, a huge East Indian bivalve..

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

Melanian :: Melanian (n.) One of a family of fresh-water pectinibranchiate mollusks, having a turret-shaped shell..

Shell :: Shell (n.) The hard calcareous or chitinous external covering of mollusks, crustaceans, and some other invertebrates. In some mollusks, as the cuttlefishes, it is internal, or concealed by the mantle. Also, the hard covering of some vertebrates, as the armadillo, the tortoise, and the like..

Boring :: Boring (n.) The act or process of one who, or that which, bores; as, the boring of cannon; the boring of piles and ship timbers by certain marine mollusks..

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..

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..

Conus :: Conus (n.) A Linnean genus of mollusks having a conical shell. See Cone, n., 4..

Odontophore :: Odontophore (n.) A special structure found in the mouth of most mollusks, except bivalves. It consists of several muscles and a cartilage which supports a chitinous radula, or lingual ribbon, armed with teeth. Also applied to the radula alone. See Radula..

Nucleus :: Nucleus (n.) A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks..

Xylophagous :: Xylophagous (a.) Eating, boring in, or destroying, wood; -- said especially of certain insect larvae, crustaceans, and mollusks..

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..

Nautiloid :: Nautiloid (n.) A mollusk, or shell, of the genus Nautilus or family Nautilidae..

Acephalous :: Acephalous (a.) Without a distinct head; -- a term applied to bivalve mollusks.

Mantle :: Mantle (n.) The external fold, or folds, of the soft, exterior membrane of the body of a mollusk. It usually forms a cavity inclosing the gills. See Illusts. of Buccinum, and Byssus..

Inclusa :: Inclusa (n. pl.) A tribe of bivalve mollusks, characterized by the closed state of the mantle which envelops the body. The ship borer (Teredo navalis) is an example..

Euthyneura :: Euthyneura (n. pl.) A large division of gastropod molluske, including the Pulmonifera and Opisthobranchiata..

Lim Naea :: Lim naea (n.) A genus of fresh-water air-breathing mollusks, abundant in ponds and streams; -- called also pond snail..

Protozoic :: Protozoic (a.) Containing remains of the earliest discovered life of the globe, which included mollusks, radiates and protozoans..

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