• synonyms


[oh-per-kuh l]
  1. an operculum, especially the posterior bone of the operculum of a fish.
Show More

Origin of opercle

First recorded in 1590–1600, opercle is from the Latin word operculum cover. See operculum, -cle2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for opercle

Historical Examples

  • In Erpetoichthys only the opercle is distinct among the gill-covers.

    A Guide to the Study of Fishes, Volume 1 (of 2)

    David Starr Jordan

  • The tip of its opercle is prolonged like an ear and jet black in color, with a dash of bright scarlet along its lower edge.

  • Overlying these is the system of membrane bones already mentioned, including the opercle or gill-cover.

  • On our sunfish we see that the opercle ends behind in a long and narrow flap, which looks like an ear.

  • The largest uppermost flat bone of the gill-covers is known as the opercle .