Definition of operculum Operculum

o•per•cu•lum

We found 11 definitions of operculum from 5 different sources.

What does operculum mean?

WordNet

Noun

Plural: opercula

operculum - 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

= synonym
= antonym
= related word

Wiktionary

operculum (Noun)
A covering flap or lidlike structure in plants and animals, such as a gill cover .

Webster DictionaryWebster's Unabridged Dictionary 📘

operculum (n.)
The lid of a pitcherform leaf.
operculum (n.)
The lid of the urnlike capsule of mosses.
operculum (n.)
Any lidlike or operculiform process or part; as, the opercula of a dental follicle.
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.
operculum (n.)
The principal opercular bone in the upper and posterior part of the gill cover.
operculum (n.)
The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.
operculum (n.)
Any lid-shaped structure closing the aperture of a tube or shell.

Chambers DictionaryChamber's 20th Century Dictionary 📕

operculum
ō-pėr′kū-lum, n. (bot.) a cover or lid: (zool.) the plate over the entrance of a shell: the apparatus which protects the gills of fishes:—pl. Oper′cula.—adjs. Oper′cular, belonging to the operculum; Oper′culate, -d, having an operculum; Operculif′erous; Oper′culiform; Operculig′enous; Operculig′erous. [L.,—operīre, to cover.]