English definition of Shell

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Definition of shell

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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..

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Mask Shell :: Mask shell () Any spiral marine shell of the genus Persona, having a curiously twisted aperture..

Siphonostomata :: Siphonostomata (n. pl.) An artificial division of gastropods including those that have siphonostomatous shells.

Multivalvular :: Multivalvular (a.) Many-valved; having more than two valves; -- said of certain shells, as the chitons..

Sea Wing :: Sea wing () A wing shell (Avicula).

Nutshell :: Nutshell (n.) The shell or hard external covering in which the kernel of a nut is inclosed.

Marine :: Marine (a.) Of or pertaining to the sea; having to do with the ocean, or with navigation or naval affairs; nautical; as, marine productions or bodies; marine shells; a marine engine..

Gourd :: Gourd (n.) A dipper or other vessel made from the shell of a gourd; hence, a drinking vessel; a bottle..

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..

Crag :: Crag (n.) A partially compacted bed of gravel mixed with shells, of the Tertiary age..

Peduncle :: Peduncle (n.) A sort of stem by which certain shells and barnacles are attached to other objects. See Illust. of Barnacle.

Cestraciont :: Cestraciont (n.) A shark of the genus Cestracion, and of related genera. The posterior teeth form a pavement of bony plates for crushing shellfish. Most of the species are extinct. The Port Jackson shark and a similar one found in California are living examples..

Liner :: Liner (n.) A lining within the cylinder, in which the piston works and between which and the outer shell of the cylinder a space is left to form a steam jacket..

Scallop :: Scallop (v. t.) To mark or cut the edge or border of into segments of circles, like the edge or surface of a scallop shell. See Scallop, n., 2..

Venus :: Venus (n.) Any one of numerous species of marine bivalve shells of the genus Venus or family Veneridae. Many of these shells are large, and ornamented with beautiful frills; others are smooth, glossy, and handsomely colored. Some of the larger species, as the round clam, or quahog, are valued for food..

Fasciole :: Fasciole (n.) A band of minute tubercles, bearing modified spines, on the shells of spatangoid sea urchins. See Spatangoidea..

Torpedo :: Torpedo (n.) A kind of detonating cartridge or shell placed on a rail, and exploded when crushed under the locomotive wheels, -- used as an alarm signal..

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..

Shell :: Shell (n.) An engraved copper roller used in print works.

Concho-spiral :: Concho-spiral (n.) A kind of spiral curve found in certain univalve shells.

Marginella :: Marginella (n.) A genus of small, polished, marine univalve shells, native of all warm seas..