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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..

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

Suboperculum :: Subopercular (n.) The suboperculum.

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

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

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

Operculum :: Operculum (n.) The lid of a pitcherform leaf.

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

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

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

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

Opercle :: Opercle (n.) An operculum.

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

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

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

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

Praeoperculum :: Praeoperculum (n.) Same as Preoperculum.

Operculums :: Operculums (pl. ) of Operculu.

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

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

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