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Turbo :: Turbo (n.) Any one of numerous marine gastropods of the genus Turbo or family Turbinidae, usually having a turbinate shell, pearly on the inside, and a calcareous operculum..

Suboperculum :: Subopercular (n.) The suboperculum.

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..

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

Operculum :: Operculum (n.) The principal opercular bone in the upper and posterior part of the gill cover.

Operculiferous :: Operculiferous (a.) Bearing an operculum.

Valvata :: Valvata (n.) A genus of small spiral fresh-water gastropods having an operculum.

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

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

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..

Preopercular :: Preopercular (n.) The preoperculum.

Unoperculated :: Unoperculated (a.) Destitute of an operculum, or cover..

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

Interoperculum :: Interoperculum (n.) The postero-inferior opercular bone, in fishes..

Serpula :: Serpula (n.) Any one of numerous species of tubicolous annelids of the genus Serpula and allied genera of the family Serpulidae. They secrete a calcareous tube, which is usually irregularly contorted, but is sometimes spirally coiled. The worm has a wreath of plumelike and often bright-colored gills around its head, and usually an operculum to close the aperture of its tube when it retracts..

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

Interpercular :: Interpercular (a.) Of or pertaining to the interoperculum.

Onycha :: Onycha (n.) An ingredient of the Mosaic incense, probably the operculum of some kind of strombus..

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

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

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