Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of shell is as below...

Physa :: Physa (n.) A genus of fresh-water Pulmonifera, having reversed spiral shells. See Pond snail, under Pond..

Tun :: Tun (n.) Any shell belonging to Dolium and allied genera; -- called also tun-shell.

Nudibranchiata :: Nudibranchiata (n. pl.) A division of opisthobranchiate mollusks, having no shell except while very young. The gills are naked and situated upon the back or sides. See Ceratobranchia..

Roughcast :: Roughcast (n.) A kind of plastering made of lime, with a mixture of shells or pebbles, used for covering buildings..

Periwinkle :: Periwinkle (n.) Any small marine gastropod shell of the genus Littorina. The common European species (Littorina littorea), in Europe extensively used as food, has recently become naturalized abundantly on the American coast. See Littorina..

Shell :: Shell (n.) A hollow projectile, of various shapes, adapted for a mortar or a cannon, and containing an explosive substance, ignited with a fuse or by percussion, by means of which the projectile is burst and its fragments scattered. See Bomb..

Gougeshell :: Gougeshell (n.) A sharp-edged, tubular, marine shell, of the genus Vermetus; also, the pinna. See Vermetus..

Shellapple :: Shellapple (n.) See Sheldafle.

Trochoid :: Trochoid (a.) Top-shaped; having a flat base and conical spire; -- said of certain shells.

Inoperculate :: Inoperculate (a.) Having no operculum; -- said of certain gastropod shells.

Ostracea :: Ostracea (n. pl.) A division of bivalve mollusks including the oysters and allied shells.

Shellac :: Shellac (n.) See the Note under 2d Lac.

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

Solarium :: Solarium (n.) Any one of several species of handsome marine spiral shells of the genus Solarium and allied genera. The shell is conical, and usually has a large, deep umbilicus exposing the upper whorls. Called also perspective shell..

Beak :: Beak (n.) The prolongation of certain univalve shells containing the canal.

Neritina :: Neritina (n.) A genus including numerous species of shells resembling Nerita in form. They mostly inhabit brackish water, and are often delicately tinted..

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..

Balanite :: Balanite (n.) A fossil balanoid shell.

Discoid :: Discoid (a.) Having the form of a disk, as those univalve shells which have the whorls in one plane, so as to form a disk, as the pearly nautilus..

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..

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