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.
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"Operculum" Quotes from Famous Books — The Manbos of Mindano - Memoirs of the National Academy of Sciences, Volume XXIII, First Memoir • John M. Garvan — Explanation of Terms Used in Entomology • John. B. Smith |
Words linked to "Operculum" : plate |
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