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The Collaborative International Dictionary
Opercle

Opercle \O"per*cle\, n. [Cf. F. opercule. See Operculum.]

  1. (Anat.) Any one of the bony plates which support the gill covers of fishes; an opercular bone.

  2. (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.