labrum

Biology, Entomology, Natural sciences, Zoology, Zootomy 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, Medicine, Sciences Any of several lip-like projections.

A large basin of warm water, with an overhanging lip, in a Roman bath.