Labrum

Webster's Dictionary of the English Language

·noun A lip or edge, as of a basin.

II. Labrum ·noun The external margin of the aperture of a shell. ·see Univalve.

III. Labrum ·noun An organ in insects and crustaceans covering the upper part of the mouth, and serving as an upper lip. ·see ·Illust. of Hymenoptera.

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