labrum

/L AA0 B R AH0 M/
noun
  1. 1

    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. 2

    Any of several lip-like projections.

  3. 3

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

Source: https://en.wiktionary.org/wiki/labrum