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labrum |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Labrum \La"brum\, n.; pl L. {Labra}, E. {Labrums}. [L.] 1. A lip or edge, as of a basin. 2. (Zo["o]l.) a An organ in insects and crustaceans covering the upper part of the mouth, and serving as an upper lip. See Illust. of {Hymenoptera}. b The external margin of the aperture of a shell. See {Univalve}.
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