labellum
/ləˈbeləm/noun
(pl. labella /-lə/)
1
- Entomology each of a pair of lobes at the tip of the proboscis in some insects【昆】（口器吻端的）唇。
2
- Botany a central petal at the base of an orchid flower, typically larger than the other petals and of a different shape【植】（兰花的）唇瓣。
词源
early 19th cent.: from Latin, diminutive of labrum 'lip'.