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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 of lesion
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. 2015.
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British Dictionary definitions for lesion

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 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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lesion 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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