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lesion

[lee-zhuh n] /ˈli ʒən/
noun
1.
an injury; hurt; wound.
2.
Pathology. any localized, abnormal structural change in the body.
3.
Plant Pathology. any localized, defined area of diseased tissue, as a spot, canker, blister, or scab.
verb (used with object)
4.
to cause a lesion or lesions in.
Origin
late Middle English
1425-1475
1425-75; late Middle English < Middle French < Latin laesiōn- (stem of laesiō) injury, equivalent to Latin laes(us) (past participle of laedere to harm, equivalent to laed- verb stem + -tus past participle suffix, with -dt- > -s-) + -iōn- -ion
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for lesioning

lesion

/ˈliːʒən/
noun
1.
any structural change in a bodily part resulting from injury or disease
2.
an injury or wound
Word Origin
C15: via Old French from Late Latin laesiō injury, from Latin laedere to hurt
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 lesioning

lesion

n.

early 15c., from Middle French lesion, from Latin laesionem (nominative laesio) "injury," from past participle stem of laedere "to strike, hurt, damage," of unknown origin. Originally with reference to any sort of hurt, whether physical or not.

Online Etymology Dictionary, © 2010 Douglas Harper
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lesioning in Medicine

lesion le·sion (lē'zhən)
n.

  1. A wound or an injury.

  2. A localized pathological change in a bodily organ or tissue.

  3. An infected or diseased patch of skin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for lesioning

lesion

in physiology, a structural or biochemical change in an organ or tissue produced by disease processes or a wound. The alteration may be associated with particular symptoms of a disease, as when a gastric ulcer produces stomach pain, or it may take place without producing symptoms, as in the early stages of cancer. Certain lesions, such as the genital chancre of syphilis, are diagnostic of a particular disease, and early recognition of the physical or biochemical injury can help to prevent later, more serious manifestations of a disease; thus, the recognition and classification of disease lesions is a major part of pathology.

Learn more about lesion with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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