[luh-bel-uh m]

noun, plural la·bel·la [luh-bel-uh] /ləˈbɛl ə/. Botany.

the petal of an orchid that differs more or less markedly from the other petals, often forming the most conspicuous part; the lip.

Origin of labellum

1820–30; < Latin, diminutive of labrum lip; for formation see castellum
Related formsla·bel·loid, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for labellum

Historical Examples of labellum

  • This leads me to conclude that the labellum is always a compound organ.

  • Is it not curious the way the labellum sits on the top of the column?

  • Petals and sepals are white, and there is a white patch on the labellum.

    The Woodlands Orchids

    Frederick Boyle

  • Duchartre describes an instance wherein one of the outer sepals of Cattleya Forbesii was adherent to the labellum.

    Vegetable Teratology

    Maxwell T. Masters

  • The blossom is normal as to the proper perianth, except that the labellum is unusually papillose, bearded almost to the base.

    Vegetable Teratology

    Maxwell T. Masters

British Dictionary definitions for labellum


noun plural -la (-lə)

the part of the corolla of certain plants, esp orchids, that forms a distinct, often lobed, lip
a lobe at the tip of the proboscis of a fly
Derived Formslabelloid, adjective

Word Origin for labellum

C19: New Latin, diminutive of Latin labrum lip
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012