The Collaborative International Dictionary
Opercle
Opercle \O"per*cle\, n. [Cf. F. opercule. See Operculum.]
(Anat.) Any one of the bony plates which support the gill covers of fishes; an opercular bone.
(Zo["o]l.) An operculum.
Wiktionary
opercle
n. 1 (context anatomy English) Any of the bony plates supporting the gill covers of fishes; an opercular bone. 2 (context zoology English) An operculum.