Definify.com
Webster 1913 Edition
Labrum
‖
La′brum
,Noun.
pl. L.
Labra
(#)
, E. Labrums
(#)
. [L.]
1.
A lip or edge, as of a basin.
2.
(Zool.)
(a)
An organ in insects and crustaceans covering the upper part of the mouth, and serving as an upper lip. See Illust. of
Hymenoptera
. (b)
The external margin of the aperture of a shell. See
Univalve
.