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n. pl. la·bi·a (-bē-ə) 1. Anatomy Any of four folds of tissue of the female external genitals. 2. Zoology a. A liplike structure, such as that forming the floor of the mouth of certain invertebrates, especially insects. b. The inner margin of the opening of a gastropod shell. 3. Botany One of the liplike divisions of a bilabiate corolla. [Latin, lip; see leb- in the Appendix of Indo-European roots.] |
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