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labellum

[luh-bel-uh m] /ləˈbɛl əm/
noun, plural labella
[luh-bel-uh] /ləˈbɛl ə/ (Show IPA).
Botany
1.
the petal of an orchid that differs more or less markedly from the other petals, often forming the most conspicuous part; the lip.
Origin
1820-1830
1820-30; < Latin, diminutive of labrum lip; for formation see castellum
Related forms
labelloid, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for labellum

labellum

/ləˈbɛləm/
noun (pl) -la (-lə)
1.
the part of the corolla of certain plants, esp orchids, that forms a distinct, often lobed, lip
2.
a lobe at the tip of the proboscis of a fly
Derived Forms
labelloid, adjective
Word Origin
C19: New Latin, diminutive of Latin labrum lip
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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12
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