OPERCULUM
\ˈɒpəkjˌʊləm], \ˈɒpəkjˌʊləm], \ˈɒ_p_ə_k_j_ˌʊ_l_ə_m]\
Definitions of OPERCULUM
- 2011 - English Dictionary Database
- 2010 - New Age Dictionary Database
- 1913 - Webster's Revised Unabridged Dictionary
- 1898 - Warner's pocket medical dictionary of today.
- 1920 - A dictionary of scientific terms.
- 1846 - Medical lexicon: a dictionary of medical science
- 1898 - American pocket medical dictionary
- 1916 - Appleton's medical dictionary
Sort: Oldest first
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a hard flap serving as a cover for the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted
By DataStellar Co., Ltd
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The lid of the urnlike capsule of mosses.
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Any lidlike or operculiform process or part; as, the opercula of a dental follicle.
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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.
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The principal opercular bone in the upper and posterior part of the gill cover.
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The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.
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Any lid-shaped structure closing the aperture of a tube or shell.
By Oddity Software
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The lid of the urnlike capsule of mosses.
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Any lidlike or operculiform process or part; as, the opercula of a dental follicle.
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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.
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The principal opercular bone in the upper and posterior part of the gill cover.
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The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.
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Any lid-shaped structure closing the aperture of a tube or shell.
By Noah Webster.
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A lid or flap, as in the capsules of Mosses ; any of the convolutions covering the island of Reil ; the lid-like structure seen in the Gastropods ; the movable plates in the shell of a Barnacle; the first pair of abdominal appendages in Limulus ; the gill-cover of Fishes ; the small plate covering the opening of a lung book in Spiders.
By Henderson, I. F.; Henderson, W. D.
By Robley Dunglison
By Willam Alexander Newman Dorland
Word of the day
tinctura quininae ammoniata
- A preparation made by dissolving quinin sulphate in alcohol [Br. Ph.].