English Dictionary

operculum

/əʊˈpɜː.kjʊ.ləm/

noun

(zoology) A covering flap in animals, such as a gill cover. / (botany) The lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal of spores or seeds.

The operculum is a protective flap that covers the gills of many fish.

意味（1）

(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.

意味（2）

(botany) The lidlike portion of a moss sporangium or of a fruit that detaches to allow the dispersal of spores or seeds.

意味（3）

(dentistry) A gum flap covering (part of) a partially erupted tooth, usually a wisdom tooth.

意味（4）

A structure which serves as a cover or lid.

I lifted the circular operculum from its place and laid it carefully on the bale.

意味（5）

(anatomy) A part of the brain.