Operculum (bryozoa) definition

Operculum (bryozoa)

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Topics Operculum (bryozoa) Definition

WordNet

noun

(1) 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

WiktionaryText

Noun

A covering flap or lidlike structure in plants and animals
A part of the brain