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Definition of: labium
(lā′bē·əm) noun plural ·bi·a (-bē·ə)
1. lip or liplike organ or part.
2. plural The folds of the external genitals of the mammalian female.
3. Entomol. A movable sclerite between the maxillae of an insect, forming the lower surface of the mouth; the lower lip. [<L, a lip]
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