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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..

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

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

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

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

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..

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

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..

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

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

Suboperculum :: Subopercular (n.) The suboperculum.

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.

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

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

Operculums :: Operculums (pl. ) of Operculu.

Opercle :: Opercle (n.) An operculum.

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

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

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

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