Definition of labellum in English:

labellum

Syllabification: la·bel·lum
Pronunciation: /ləˈbeləm
 
/

noun (plural labella /-ˈbelə/)

  • 1 Entomology Each of a pair of lobes at the tip of the proboscis in some insects.
  • 2 Botany A central petal at the base of an orchid flower, typically larger than the other petals and of a different shape.
    More example sentences
    • If insects smaller than the pollinator become trapped they may crawl out without pollination occurring or, if larger than the pollinator, they may stay trapped until the labellum opens again.
    • In attempting unsuccessfully to couple with the labellum the male pushes its head forward below the overhanging column.
    • The males then try to mate with the labellum or else lift it as they would a female wasp.

Origin

early 19th century: from Latin, diminutive of labrum 'lip'.

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