labellum

The median petal of an orchid flower, usually different in shape, size, or color from the two lateral petals; lip.

A liplike part, such as the tip of the labium of certain flies, used for lapping up liquids.

In botany, one of the three divisions of an orchidaceous corolla, differing from the others in shape or direction, and not seldom spurred; the lip.

In entomology, a part of the mouth of an insect, by some considered to be the epipharynx. In Diptera the labellum is one of a pair of tumid lobes terminating the theca of the proboscis.

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

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

The lower central petal of orchid flowers, usually developed to be showy and attract pollinators.