Definitions for "Opercular"
Of, pertaining to, or like, an operculum.
The principal opercular bone or operculum of fishes.
A covering/forming a covering. For female Janiroidean asellotan isopods the operculum equates to a plate over the branchial chamber of the abdomen consisting of the fused second pleopods (the first pleopods are absent in these isopods).
Over the gill plates
scale over the ear