Learn how to say Opercular correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word operculum:
noun (plural opercula /-lə/)
Zoology & Botany
a structure that closes or covers an aperture, in particular:
technical term for gill cover.
a secreted plate that closes the aperture of a gastropod mollusc’s shell when the animal is retracted.
a lid-like structure of the spore-containing capsule of a moss.
early 18th century: from Latin, literally ‘lid, covering’, from operire ‘to cover’