Dense fibrous connective tissue that forms over a healed wound or cut.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "scar tissue" in a sentence
"Nonsurgical removal of scar tissue and tough connective tissue"
"A progressive autoimmune disease in which the immune cells attack the connective tissue in the body—the collagen within human skin and tissue as well as the elastin in the ligaments that connect bones—scleroderma can leave damaging scar tissue in the skin as well as organs."
"I notice that at each place where an ash has been bent or cut it has grown stronger, swelling into a callous like a human knee or puckering into a bump of scar tissue round the little star-cracked crater of each amputated branch."