What is the meaning of Labrum?

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.

Any of several lip-like projections.

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

lip

edge, margin, brim, lip

A bathing tub, bathtub, basin, bowl

A bath, bathing place.

Source: wiktionary.org