[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.

Origin of labrum

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.

Origin of labrum

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

Examples from the Web for labrum

Historical Examples of labrum

British Dictionary definitions for labrum


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

Word Origin for labrum

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 labrum

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.

Online Etymology Dictionary, © 2010 Douglas Harper

labrum in Medicine


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