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n. pl. la·bel·la (-bĕl′ə)
1. The median petal of an orchid flower, usually different in shape, size, or color from the two lateral petals; lip.
2. A liplike part, such as the tip of the labium of certain flies, used for lapping up liquids.

[Latin, diminutive of labrum, lip; see leb- in Indo-European roots.]

la·bel′late (-ĭt) adj.


n, pl -la (-lə)
1. (Botany) the part of the corolla of certain plants, esp orchids, that forms a distinct, often lobed, lip
2. (Zoology) a lobe at the tip of the proboscis of a fly
[C19: New Latin, diminutive of Latin labrum lip]
laˈbelloid adj


(ləˈbɛl əm)

n., pl. -bel•la (-ˈbɛl ə)
the lowest of the three orchid petals, usu. larger and more conspicuous than the others; the lip.
[1820–30; < Latin, diminutive of labrum lip]
la•bel′loid, adj.
References in periodicals archive ?
Once a female mosquito has landed the texture and perhaps taste of the host's surface would be perceived first by the tactile setae and contact chemosensilla on the tarsi and subsequently labellum sensilla.
Clearly at 40oC, an intense dehydration reduced the self life to less than a day, while for the wet storage condition only at third day appeared symptoms of senescence, which was characterized by discoloration and necrosis of labellum, but no visual detectable wilting of petals or necrosis of labellum were present.
The osmophores are mostly located in the labellum, with sporadic occurrence in the sepals.