[ley-bruh m, lab-ruh m]
- a lip or liplike part.
- the anterior, unpaired member of the mouthparts of an arthropod, projecting in front of the mouth.
- 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
- an ornamented bathtub of ancient Rome.
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
Examples from the Web for labrum
It will be remembered that the labrum is provided with a groove.Insects and Diseases
Rennie W. Doane
They make the puncture and are interlocked with the labrum to form a sucking tube.
The labrum is considered by some authorities to be the hypopharynx.
There are teeth on each side of the central notch of the labrum.A Monograph on the Sub-class Cirripedia (Volume 2 of 2)
The labrum or upper-lip is fulvous; and the antenn are piceous.An Introduction to Entomology: Vol. II (of 4)
- a lip or liplike part, such as the cuticular plate forming the upper lip of insects
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
- 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.