ɒpərˈkjuːl

Definitions

1. noun

A small lid or cover, especially one that is hinged at the back and is used to seal a bottle or a container, especially a beer bottle or a champagne bottle.

“The sommelier carefully removed the opercule to pour the expensive champagne into a delicate glass.”

2. noun

A small opening or orifice, especially one that serves as a breathing hole or a lid.

“The tiny opercule on the turtle’s shell allows it to breathe while it is underwater.”