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  • English Word Operculated Definition Having an operculum, or an apparatus for protecting the gills; -- said of shells and of fishes.
  • English Word Operculiferous Definition Bearing an operculum.
  • English Word Operculiform Definition Having the form of a lid or cover.
  • English Word Operculigenous Definition Producing an operculum; -- said of the foot, or part of the foot, of certain mollusks.
  • English Word Operculum Definition The lid of a pitcherform leaf.
  • English Word Operculum Definition The lid of the urnlike capsule of mosses.
  • English Word Operculum Definition Any lidlike or operculiform process or part; as, the opercula of a dental follicle.
  • English Word Operculum Definition The fold of integument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid.
  • English Word Operculum Definition The principal opercular bone in the upper and posterior part of the gill cover.
  • English Word Operculum Definition The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda.
  • English Word Operculum Definition Any lid-shaped structure closing the aperture of a tube or shell.
  • English Word Operculums Definition of Operculum
  • English Word Operetta Definition A short, light, musical drama.
  • English Word Operose Definition Wrought with labor; requiring labor; hence, tedious; wearisome.
  • English Word Operosity Definition Laboriousness.
  • English Word Operous Definition Operose.
  • English Word Opertaneous Definition Concealed; private.
  • English Word Opetide Definition Open time; -- applied to different things
  • English Word Opetide Definition The early spring, or the time when flowers begin opening.
  • English Word Opetide Definition The time between Epiphany and Ash Wednesday wherein marriages were formerly solemnized publicly in churches. [Eng.]
  • English Word Opetide Definition The time after harvest when the common fields are open to all kinds of stock.
  • English Word Ophelic Definition Of, pertaining to, or designating, a substance (called ophelic acid) extracted from a plant (Ophelia) of the Gentian family as a bitter yellowish sirup, used in India as a febrifuge and tonic.
  • English Word Ophicleide Definition A large brass wind instrument, formerly used in the orchestra and in military bands, having a loud tone, deep pitch, and a compass of three octaves; -- now generally supplanted by bass and contrabass tubas.
  • English Word Ophidia Definition The order of reptiles which includes the serpents.
  • English Word Ophidia Definition of Ophidion
  • English Word Ophidian Definition One of the Ophidia; a snake or serpent.
  • English Word Ophidian Definition Of or pertaining to the Ophidia; belonging to serpents.
  • English Word Ophidioid Definition Of or pertaining to the Ophidiidae, a family of fishes which includes many slender species.
  • English Word Ophidioid Definition One of the Ophidiidae.
  • English Word Ophidion Definition The typical genus of ophidioid fishes. [Written also Ophidium.] See Illust. under Ophidioid.