Source : Webster's Revised Unabridged Dictionary (1913)

Operculate \O*per"cu*late\, Operculated \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. (Zo["o]l.) Having an operculum, or an apparatus for
      protecting the gills; -- said of shells and of fishes.

Source : WordNet®

operculate
     adj : having an operculum [syn: {operculated}]