Labellum

·noun A small appendage beneath the upper lip or labrum of certain insects.

II. Labellum ·noun The lower or apparently anterior petal of an orchidaceous flower, often of a very curious shape.

labellum
lăbellum, i, n. dim. [1. labrum], a little lip , Plaut. Ps. 1, 1, 67; id. As. 4, 1, 52: dentes i...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
labellum
lābellum (1) ī, n dim.1 labrum, a little lip : Platoni cum apes in labellis consedissent: calamo t...

An Elementary Latin Dictionary