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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..

Opercle :: Opercle (n.) An operculum.

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

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

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..

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

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..

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

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

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

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

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

Suborbicular :: Suboperculum (n.) The lower opercular bone in fishes.

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

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

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

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

Interpercular :: Interpercular (a.) Of or pertaining to the interoperculum.

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..

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