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[lohb] /loʊb/
a roundish projection or division, as of an organ or a leaf.
Origin of lobe
1515-25; < Medieval Latin lobus (Late Latin: hull, husk, pod) < Greek lobós, akin to Latin legula lobe of the ear
Related forms
multilobe, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for lobe
  • When he pulls his ear lobe and rubs his chin, he is telling the truth.
  • Each lobe includes an amygdala and a seahorse-shaped structure called the hippocampus.
  • Beyond their useful pectoral fins, all have unevenly forked tails, with the lower lobe longer than the upper lobe.
  • The frontal lobe is responsible for high-level executive function and attention.
  • Each muscle is controlled by motor neurons that reside in the brain in the frontal lobe.
  • And plus, they don't have the frontal lobe power to hold back.
  • Lose your vision, and the lobe that processed light may repurpose itself for other senses.
  • On the outer edge of each such cloud, as viewed at radio wavelengths, is a compact lobe of exceptional brilliance.
  • The remaining thyroid lobe will generally grow so that it can produce sufficient amounts of thyroid hormone for normal function.
  • The right branch of the portal vein enters the right lobe of the liver, but before doing so generally receives the cystic vein.
British Dictionary definitions for lobe


any rounded projection forming part of a larger structure
any of the subdivisions of a bodily organ or part, delineated by shape or connective tissue
short for ear lobe
any of the loops that form part of the graphic representation in cylindrical coordinates of the radiation pattern of a transmitting aerial Compare radiation pattern
any of the parts, not entirely separate from each other, into which a flattened plant part, such as a leaf, is divided
Word Origin
C16: from Late Latin lobus, from Greek lobos lobe of the ear or of the liver
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
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Word Origin and History for lobe

early 15c., "a lobe of the liver or lungs," from Middle French lobe and directly from Medieval Latin lobus, from Late Latin lobus "hull, husk, pod," from Greek lobos "lobe of the ear, vegetable pod," perhaps related to Greek leberis "husk of fruits," from PIE *logwos. Extended 1670s to divisions of the brain.

Online Etymology Dictionary, © 2010 Douglas Harper
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lobe in Medicine

lobe (lōb)

  1. A rounded projection, especially a rounded, projecting anatomical part, such as the lobe of the ear.

  2. A subdivision of a body organ or part bounded by fissures, connective tissue, or other structural boundaries.

  3. One of the larger divisions of the crown of a tooth, formed from a distinct point of calcification.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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lobe in Science
  1. A rounded projection, as on a leaf or petal. The leaves of many oak species have prominent lobes.

  2. An anatomical division of an organ of the body. The liver, lungs, and brain are all characterized by lobes that are held in place by connective tissue.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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