labellum

noun
la·​bel·​lum | \lə-ˈbe-ləm \
plural labella\ lə-​ˈbe-​lə \

Definition of labellum 

1 : the median and usually most morphologically distinct member of the corolla of an orchid

2 : a terminal part of the labium or labrum of various insects

First Known Use of labellum

1830, in the meaning defined at sense 1

History and Etymology for labellum

New Latin, from Latin, diminutive of labrum lip — more at lip

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The first known use of labellum was in 1830

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