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...

Valve :: Valve (n.) One of the two similar portions of the shell of a diatom.

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..

Shard :: Shard (n.) A piece or fragment of an earthen vessel, or a like brittle substance, as the shell of an egg or snail..

Determination :: Determination (n.) The act of determining the relations of an object, as regards genus and species; the referring of minerals, plants, or animals, to the species to which they belong; classification; as, I am indebted to a friend for the determination of most of these shells..

Shell :: Shell (n.) Hence, by extension, any mollusks having such a covering..

Protoconch :: Protoconch (n.) The embryonic shell, or first chamber, of ammonites and other cephalopods..

Paludina :: Paludina (n.) Any one of numerous species of freshwater pectinibranchiate mollusks, belonging to Paludina, Melantho, and allied genera. They have an operculated shell which is usually green, often with brown bands. See Illust. of Pond snail, under Pond..

Coronated :: Coronated (a.) Girt about the spire with a row of tubercles or spines; -- said of spiral shells.

Trough-shell :: Trough-shell (n.) Any bivalve shell of the genus Mactra. See Mactra.

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

Operculated :: Operculated (a.) Having an operculum, or an apparatus for protecting the gills; -- said of shells and of fishes..

Conchometer :: Conchometer (n.) An instrument for measuring shells, or the angle of their spire..

Feather-edge/ :: Feather-edge/ (n.) The thin, new growth around the edge of a shell, of an oyster..

Cantrip :: Cantrip (n.) A charm; an incantation; a shell; a trick; adroit mischief.

Umbrella :: Umbrella (n.) Any marine tectibranchiate gastropod of the genus Umbrella, having an umbrella-shaped shell; -- called also umbrella shell..

Cornu Ammonis :: Cornu Ammonis () A fossil shell, curved like a ram's horn; an obsolete name for an ammonite..

Frogshell :: Frogshell (n.) One of numerous species of marine gastropod shells, belonging to Ranella and allied genera..

Roughcast :: Roughcast (v. t.) To plaster with a mixture of lime and shells or pebbles; as, to roughcast a building..

Concavo-convex :: Concavo-convex (a.) Concave on one side and convex on the other, as an eggshell or a crescent..

Celluloid :: Celluloid (n.) A substance composed essentially of gun cotton and camphor, and when pure resembling ivory in texture and color, but variously colored to imitate coral, tortoise shell, amber, malachite, etc. It is used in the manufacture of jewelry and many small articles, as combs, brushes, collars, and cuffs; -- originally called xylonite..

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