noun
definition
The lower central petal of a flower (especially an orchid), usually developed to be showy and attract pollinators.
definition
Part of the mouth of an insect, especially the sucking mouthparts of a fly.
Examples of labellum in a Sentence
So different is it that it receives a distinct name, that of the "lip" or "labellum."
The letter L indicates the position of the labellum; the large figures indicate the developed stamens; the italic figures show the position of the suppressed stamens.
Sometimes the twisting of a part makes a change in the position of other parts, as in Orchids, where the twisting of the ovary changes the position of the labellum.
In some corollas the two lips become hollowed out in a remarkable manner, as in calceolaria, assuming a slipper-like appearance, similar to what occurs in the labellum of some orchids, as Cypripedium.