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[oh-per-kuh l] /ˈoʊ pər kəl/
an operculum, especially the posterior bone of the operculum of a fish.
Origin of opercle
1590-1600; < Latin operculum cover. See operculum, -cle2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for opercle
  • The opercle was then evaluated as a structure for aging.
  • Spawning fish generally develop bright red coloration on the underside of the mandible and on the opercle.
  • The pumpkinseed can be distinguished from the bluegill by the opercle flap on the rear of the operculum.
  • Coloration generally olive dorsally and silvery, with a conspicuous red streak or smudge posterior of opercle.
  • For stock identification these fish were opercle-tagged prior to transport.

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