D defs.my
Entry 2 senses Webster, 1913

Labrum

/lā′-brəm/ · La·brum · IPA /ˈleɪ.bɹəm/
01 n. A lip or edge, as of a basin.
pl. Labra, Labrums ((#))
  1. 1.
    A lip or edge, as of a basin.
  2. 2.
    An organ in insects and crustaceans covering the upper part of the mouth, and serving as an upper lip. See Illust. of Hymenoptera.(Zool.) See: Hymenoptera