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 formsmul·ti·lobe, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for lobe

Historical Examples of lobe

  • I noticed the glitter of a gold earring in the lobe of his huge ear.


    Joseph Conrad and F.M. Hueffer

  • It is as if one lobe of my brain kept watch over the action of the other.'

    The Shadow World

    Hamlin Garland

  • Then all at the first Takbr put the hands to the lobe of the ears and say: "God is Great!"

  • They moved by sucking in the water at one end of the lobe, and expelling it at the other.

  • He turned to his fellow, who examined the wounded ear, the lobe of which was split.

    King o' the Beach

    George Manville Fenn

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 aerialCompare 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 for lobe

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

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

lobe in Medicine




A rounded projection, especially a rounded, projecting anatomical part, such as the lobe of the ear.
A subdivision of a body organ or part bounded by fissures, connective tissue, or other structural boundaries.
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.

lobe in Science



A rounded projection, as on a leaf or petal. The leaves of many oak species have prominent lobes.
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.