Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of operculum is as below...

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

Opercle :: Opercle (n.) An operculum.

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

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

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

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..

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..

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

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

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

Operculums :: Operculums (pl. ) of Operculu.

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

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

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

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

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

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.) The lid of the urnlike capsule of mosses.

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

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