The Collaborative International Dictionary
Labellums
Labellum \La*bel"lum\ (l[.a]*b[e^]l"l[u^]m), n.; pl. L. Labella (l[.a]*b[e^]l"l[.a]), E. Labellums (l[.a]*b[e^]l"l[u^]mz). [L., dim. of labrum lip.]
(Bot.) The lower or apparently anterior petal of an orchidaceous flower, often of a very curious shape.
(Zo["o]l.) A small appendage beneath the upper lip or labrum of certain insects.