from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The often enlarged petal of an orchid flower.
- n. A liplike part, such as the tip of the proboscis of various insects, used for lapping up liquids.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The lower central petal of orchid flowers, usually developed to be showy and attract pollinators.
from the GNU version of the Collaborative International Dictionary of English
- n. The lower or apparently anterior petal of an orchidaceous flower, often of a very curious shape.
- n. A small appendage beneath the upper lip or labrum of certain insects.
from The Century Dictionary and Cyclopedia
- n. 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.
- n. 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.
Latin, diminutive of labrum, lip; see leb- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin labellum ("small tub or basin"), diminutive of labrum ("basin, tub"), from lavō ("bathe"). (Wiktionary)