What does operculum mean?
Operculum means (zoology) A covering flap in animals, such as a gill cover..
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/əʊˈpɜː.kjʊ.ləm/ · noun
(zoology) A covering flap in animals, such as a gill cover..
Hyoliths […] have a small, conical calcium carbonate shell, with a lid called an operculum.
I lifted the circular operculum from its place and laid it carefully on the bale.
Use operculum when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Operculum means (zoology) A covering flap in animals, such as a gill cover..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Hyoliths […] have a small, conical calcium carbonate shell, with a lid called an operculum.
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