noun, plural la·bel·la [luh-bel-uh] /ləˈbɛl ə/. Botany.
Origin of labellum
Examples from the Web for labellum
Historical Examples of labellum
This leads me to conclude that the labellum is always a compound organ.More Letters of Charles Darwin Volume II
Is it not curious the way the labellum sits on the top of the column?More Letters of Charles Darwin
Petals and sepals are white, and there is a white patch on the labellum.The Woodlands Orchids
Duchartre describes an instance wherein one of the outer sepals of Cattleya Forbesii was adherent to the labellum.
The blossom is normal as to the proper perianth, except that the labellum is unusually papillose, bearded almost to the base.