operculum
pronunciation
How to pronounce operculum in British English: UK [əʊ'pɜ:kjʊləm]
How to pronounce operculum in American English: US [oʊ'pɜkjʊləm]
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- 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