{ O‐per″cu‐late (?), O‐per″cu‐la′ted (?), } a. [L. operculatus, p. p. of operculare to furnish with a lid, fr. operculum lid.] 1. (Bot.) Closed by a lid or cover, as the capsules of the mosses.
2. (Zoöl.) Having an operculum, or an apparatus for protecting the gills; — said of shells and of fishes.