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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Word of the Day

10 March 2025

FABLED

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Coffee Trivia

According to Guinness World Records, the largest coffee press is 230 cm (7 ft 6 in) in height and 72 cm (2 ft 4 in) in diameter and was created by Salzillo Tea and Coffee (Spain) in Murcia, Spain, in February 2007. The cafetière consists of a stainless steel container, a filtering piston, and a superior lid.

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