operculum
/əʊˈpɜːkjʊləm/noun
(pl. opercula /-lə/)
1- Zoology & Botany a structure that closes or covers an aperture, in particular【动, 植】盖, 尤指：
1.1
- technical term for GILL COVER.〈技〉同GILL COVER.
1.2
- a secreted plate that serves to close the aperture of a gastropod mollusc's shell when the animal is retracted（腹足软体动物的）厣盖。
1.3
- a lid-like structure of the spore-containing capsule of a moss（苔藓的）蒴盖, 囊盖。
派生词
opercular
adjectiveoperculate
adjectiveoperculi-
combining form词源
early 18th cent.: from Latin, literally 'lid, covering', from operire 'to cover'.