labium
(redirected from labia oris)Also found in: Dictionary, Thesaurus, Medical.
Related to labia oris: labium superius oris, labium inferius oris
labium
1. a lip or liplike structure
2. any one of the four lip-shaped folds of the female vulva
3. the fused pair of appendages forming the lower lip of insects
4. the lower lip of the corolla of labiate flowers
labium
[′lā·bē·əm] (biology)
A liplike structure.
The lower lip, as of a labiate corolla or of an insect.