Labellum
Pronunciation : La*bel"lum, n.; pl. L. Labella
Part of Speech : E.
Etymology : [L., dim. of labrum lip.]
Definition : 1. (Bot.)
Defn: The lower or apparently anterior petal of an orchidaceous flower, often of a very curious shape.
2. (Zo?l.)
Defn: A small appendage beneath the upper lip or labrum of certain insects.
Labellums.
Source : Webster's Unabridged Dictionary, 1913