English definition of Operculum

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Definition of operculum

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Operculum (n.) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda..

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Oparcular :: Oparcular (a.) Of, pertaining to, or like, an operculum..

Opercle :: Opercle (n.) An operculum.

Preopercular :: Preopercular (n.) The preoperculum.

Subopercular :: Subopercular (a.) Situated below the operculum; pertaining to the suboperculum.

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

Opercular :: Opercular (n.) The principal opercular bone or operculum of fishes.

Tergum :: Tergum (n.) One of the dorsal plates of the operculum of a cirriped.

Operculum :: Operculum (n.) Any lid-shaped structure closing the aperture of a tube or shell.

Rostellum :: Rostellum (n.) A small beaklike process or extension of some part; a small rostrum; as, the rostellum of the stigma of violets, or of the operculum of many mosses; the rostellum on the head of a tapeworm..

Paucispiral :: Paucispiral (a.) Having few spirals, or whorls; as, a paucispiral operculum or shell..

Scutum :: Scutum (n.) One of the two lower valves of the operculum of a barnacle.

Operculigenous :: Operculigenous (a.) Producing an operculum; -- said of the foot, or part of the foot, of certain mollusks..

Nucleus :: Nucleus (n.) The central part around which additional growths are added, as of an operculum..

Operculum :: Operculum (n.) The fold of integument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid..

Preoperculum :: Preoperculum (n.) The anterior opercular bone in fishes.

Preopercular :: Preopercular (a.) Situated in front of the operculum; pertaining to the preoperculum.

Opercula :: Opercula (n. pl.) See Operculum.

Operculums :: Operculums (pl. ) of Operculu.

Suborbicular :: Suboperculum (n.) The lower opercular bone in fishes.

Turritella :: Turritella (n.) Any spiral marine gastropod belonging to Turritella and allied genera. These mollusks have an elongated, turreted shell, composed of many whorls. They have a rounded aperture, and a horny multispiral operculum..