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

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

Eyestone :: Eyestone (n.) A small, lenticular, calcareous body, esp. an operculum of a small marine shell of the family Turbinidae, used to remove a foreign substance from the eye. It is put into the inner corner of the eye under the lid, and allowed to work its way out at the outer corner, bringing with it the substance..

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

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

Suboperculum :: Subopercular (n.) The suboperculum.

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

Operculums :: Operculums (pl. ) of Operculu.

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..

Operculum :: Operculum (n.) Any lidlike or operculiform process or part; as, the opercula of a dental follicle..

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

Preopercular :: Preopercular (n.) The preoperculum.

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..

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

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

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

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..

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

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

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