Definition of "labrum" in English

noun

1. (entomology, 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.

2. (anatomy) Any of several lip-like projections.

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