Definition of operculum

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

Lern More About Operculum

Opercle :: Opercle (n.) An operculum.
Operculum :: Operculum (n.) Any lid-shaped structure closing the aperture of a tube or shell.
Operculum :: Operculum (n.) The lid of a pitcherform leaf.
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..
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..
Onycha :: Onycha (n.) An ingredient of the Mosaic incense, probably the operculum of some kind of strombus..
Praeoperculum :: Praeoperculum (n.) Same as Preoperculum.
Preopercular :: Preopercular (a.) Situated in front of the operculum; pertaining to the preoperculum.
Paucispiral :: Paucispiral (a.) Having few spirals, or whorls; as, a paucispiral operculum or shell..
Subopercular :: Subopercular (a.) Situated below the operculum; pertaining to the suboperculum.
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..
Interoperculum :: Interoperculum (n.) The postero-inferior opercular bone, in fishes..
Inoperculate :: Inoperculate (a.) Having no operculum; -- said of certain gastropod shells.
Unoperculated :: Unoperculated (a.) Destitute of an operculum, or cover..
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..
Opercular :: Opercular (n.) The principal opercular bone or operculum of fishes.
Suboperculum :: Subopercular (n.) The suboperculum.
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