labellum /ləˈbɛləm 
/ ▸ noun (plural labella /ləˈbɛlə/) 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. – ORIGIN early 19th century: from Latin, diminutive of labrum ‘lip’.
EnglishOxford Dictionary of English
