n. pl. See Operculum. [ 1913 Webster ]

a. Of, pertaining to, or like, an operculum. [ 1913 Webster ]

n. (Anat.) The principal opercular bone or operculum of fishes. [ 1913 Webster ]

{ } 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. [ 1913 Webster ]

2. (Zool.) Having an operculum, or an apparatus for protecting the gills; -- said of shells and of fishes. [ 1913 Webster ]