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OPERCULA
OPERCULUM
operculum
(noun) a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted
Source: WordNet® 3.1
Noun
opercula
plural of operculum
Source: Wiktionary
O*per"cu*la, n. pl.
Definition: See Operculum.
OPERCULUM
O*per"cu*lum, n.; pl. L. Opercula, E. Operculums. Etym: [L., a cover or lid, fr. operire to cover.]
1. (Bot.) (a) The lid of a pitcherform leaf. (b) The lid of the urnlike capsule of mosses.
2. (Anat.) (a) Any lidlike or operculiform process or part; as, the opercula of a dental follicle. (b) 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. (c) The principal opercular bone in the upper and posterior part of the gill cover.
3. (Zoöl.) (a) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda. (b) Any lid-shaped structure closing the aperture of a tube or shell.
Source: Webster’s Unabridged Dictionary 1913 Edition
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10 April 2025
EXTINGUISHABLE
(adjective) capable of being extinguished or killed; “an extinguishable fire”; “hope too is extinguishable”
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