Learn how to say Labellum correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word labellum:
noun (plural labella /-lə/)
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.
early 19th century: from Latin, diminutive of labrum ‘lip’