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.
Today's words Word don't know: Today I learned that the plural of labellum is labellums.
This experiment let them show that the protein was made in the fly's major taste organ (called the labellum) and trace its manufacture to a subset of sensory cells that respond to noxious chemicals.
Does it not imply that all that part of the labellum which is supplied by vessels coming from a lateral bundle must be part of a primordially distinct organ, however closely the two may have become united?
This species is apparently prone to developmental errors so that the labellum can be petaloid or (as in this case) all the petals develop the labellum (lip) characteristics.
An allied species with a blue labellum occurs in the collection gathered at Purdie Ponds.
A similar occurrence happens occasionally in _Lycaste Skinneri_, thus recalling the structure of _Masdevallia_, where the labellum is normally very small.
[Transcriber's note: The underscores represent a horizontal curly brace in the original.] the + indicating the position of the absent labellum.
The ordinary structure of the flower with its three sepals, two petals, labellum, column; and inferior ovary, is well known.
In _Orchidaceæ_ entire absence of the labellum, frequently without any other perceptible change, is of common occurrence.
Moreover, when the stamens are petalodic, the form assumed is usually that of the labellum.