Operculums
Operculum O*per"cu*lum, n.; pl. L. {Opercula}, E. {Operculums}. [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. [1913 Webster]

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. [1913 Webster]

3. (Zo["o]l.) (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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • operculums — n. body part which serves as a covering (Anatomy, Botany, and Zoology)o·per·cu·lum || əʊ pÉœrkjÉ™lÉ™m /É’ pɜːkjÊŠ …   English contemporary dictionary

  • Opercula — Operculum O*per cu*lum, n.; pl. L. {Opercula}, E. {Operculums}. [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. [1913 Webster] 2. (Anat.) (a) Any lidlike or… …   The Collaborative International Dictionary of English

  • Operculum — O*per cu*lum, n.; pl. L. {Opercula}, E. {Operculums}. [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. [1913 Webster] 2. (Anat.) (a) Any lidlike or operculiform …   The Collaborative International Dictionary of English

  • Cochlostomatinae — drawing of the shell of Cochlostoma septemspirale Scientific classification Kingdom …   Wikipedia

  • Operculum (gastropod) — Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place …   Wikipedia

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