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Etymology
1. operculum
noun. 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.
Etymology
- operire (Latin)
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Sentences with operculum
1. Noun, singular or mass
To further make its point, it covers the top of its burrow with a little lid called an operculum.