Recent Examples of operculum from the Web
Scallops, for example, showcase a complex system of camouflage, with a colored shell on top and a white shell on the bottom; most gastropods are born with trapdoor-like devices called an operculum, which protect them from predators.
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Origin and Etymology of operculum
First Known Use: 1681See Words from the same year
medical Definition of operculum
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