• synonyms


[ley-bruh m, lab-ruh m]
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noun, plural la·bra [ley-bruh, lab-ruh] /ˈleɪ brə, ˈlæb rə/.
  1. a lip or liplike part.
  2. Zoology.
    1. the anterior, unpaired member of the mouthparts of an arthropod, projecting in front of the mouth.
    2. the outer margin of the aperture of a shell of a gastropod.
  3. Anatomy. a ring of cartilage about the edge of a joint surface of a bone.
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Origin of labrum1

1810–20; < Latin: lip; akin to labium


[ley-bruh m]
noun, plural la·bra [ley-bruh] /ˈleɪ brə/. Archaeology.
  1. an ornamented bathtub of ancient Rome.
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Origin of labrum2

< Latin lābrum basin, contraction of lavābrum bathtub, equivalent to lavā(re) to wash + -brum instrumental suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for labra

Historical Examples

  • Now Labra was never seen save by one man, once a year, without a hood that covered his head and ears.

    The High Deeds of Finn and other Bardic Romances of Ancient Ireland

    T. W. Rolleston

  • T is considered to be the tepidarium with four warm baths taken out of its four angles, and two labra on its two flanks.

    History of Sanitation

    John Joseph Cosgrove

  • Labra, the autonomist deputy for Cuba, and no one has forgotten the proposition presented to the Congress by Sr.

    The Katipunan

    J. Brecknock Watson (AKA Francis St. Clair)

British Dictionary definitions for labra


  1. the plural of labrum
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noun plural -bra (-brə)
  1. a lip or liplike part, such as the cuticular plate forming the upper lip of insects
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Word Origin

C19: New Latin, from Latin
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

Word Origin and History for labra



lip or lip-like part, 1816, in various anatomical and zoological uses, from Latin labrum, cognate with labium "lip" (see lip (n.)). Also noted mid-15c. as the name of some herb.

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Online Etymology Dictionary, © 2010 Douglas Harper

labra in Medicine


n. pl. la•bra (-brə)
  1. A lip-shaped anatomical edge, rim, or structure.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.