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noun Operculum n. (pl. L. opercula, E. operculums) 1.(Bot.) (a)The lid of a pitcherform leaf. (b)The lid of the urnlike capsule of mosses. 2.(Anat.) (a)Any lidlike or operculiform process or part; as, the opercula of a dental follicle. (b)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. (c)The principal opercular bone in the upper and posterior part of the gill cover. 3.(Zool.) (a)The lid closing the aperture of various species of shells, as the common whelk. (b)Any lid-shaped structure closing the aperture of a tube or shell.
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Collaborative International Dictionary of English 0.48
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Type un???get* to find words that start with 'un', followed by any three letters, then by 'get', with any ending:
unforgettable unforgetful underget
? represents a single letter * represents any number of letters (including zero letters) For example, the following words are linked to dog:
canine, domestic animal, pursue, puppy, genus Canis, barker, dalmatian, poodle
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