noun Pathology.
an abnormal proliferation of scar tissue, as on the site of a surgical incision.
Also, cheloid.

1850–55; earlier kel(is) keloid (< Greek kēlís stain, spot) + -oid

keloidal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
keloid or cheloid (ˈkiːlɔɪd)
pathol a hard smooth pinkish raised growth of scar tissue at the site of an injury, tending to occur more frequently in dark-skinned races
[C19: from Greek khēlē claw]
cheloid or cheloid
[C19: from Greek khēlē claw]
ke'loidal or cheloid
che'loidal or cheloid

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Medical Dictionary

keloid ke·loid or che·loid (kē'loid')
A red, raised formation of fibrous scar tissue caused by excessive tissue repair in response to trauma or incision.

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 Britannica


fibrous tissue overgrowth occurring in scars. Usually only the skin layers are affected in this manner; scars of the mucous membranes or deeper tissues do not form keloids. Keloids are sometimes equated with fibrous tumours, but most pathologists do not consider them to be neoplasms (new growths of physiologically nonfunctional tissue).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
She pressed her hands firmly but gently alongside the sensitive keloid above where her stomach use to be.
Exposure to the sun during the first year after the keloid forms will cause the keloid to tan darker than the skin around it.
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