As a noun labium is
(anatomy) a liplike structure; especially one of the two pairs of folds of skin either side of the vulva.
From (etyl) .
The uppermost of the mouthparts (trophi) of a typical insect, such as a cockroach. Typically resembles an upper lip and forms part of the roof of the mouth in such insects.
(anatomy) Any of several lip-like projections.
A large basin of warm water, with an overhanging lip, in a Roman bath.
* glenoid labrum
* acetabular labrum
(anatomy) A liplike structure; especially one of the two pairs of folds of skin either side of the vulva.
(botany) The lip of a labiate corolla.
(music) The lip against which pressured air is driven in a flue pipe in an organ.
* labia majora
* labia minora