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[ley-bruh m, lab-ruh m] /ˈleɪ brəm, ˈlæb rəm/
noun, plural labra
[ley-bruh, lab-ruh] /ˈleɪ brə, ˈlæb rə/ (Show IPA)
a lip or liplike part.
  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.
Anatomy. a ring of cartilage about the edge of a joint surface of a bone.
Origin of labrum1
1810-20; < Latin: lip; akin to labium


[ley-bruh m] /ˈleɪ brəm/
noun, plural labra
[ley-bruh] /ˈleɪ brə/ (Show IPA).
an ornamented bathtub of ancient Rome.
< Latin lābrum basin, contraction of lavābrum bathtub, equivalent to lavā(re) to wash + -brum instrumental suffix Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for labrum
  • Management of the throwing shoulder: cuff, labrum and internal impingement.
  • The procedure included clean up of the labrum and bursa and clean up and reinforcement of the rotator cuff.
British Dictionary definitions for labrum


/ˈleɪbrəm; ˈlæb-/
noun (pl) -bra (-brə)
a lip or liplike part, such as the cuticular plate forming the upper lip of insects
Word Origin
C19: New Latin, from Latin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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
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labrum in Medicine

labrum la·brum (lā'brəm)
n. pl. la·bra (-brə)
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.
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