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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..

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

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..

Opercle :: Opercle (n.) An operculum.

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..

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

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

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

Operculum :: Operculum (n.) The lid of the urnlike capsule of mosses.

Suboperculum :: Subopercular (n.) The suboperculum.

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

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..

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..

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

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

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

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

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

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

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

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