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gangrene (n.)

"putrefaction or necrosis of soft tissues," 1540s, cancrena, from Latin gangraena (Medieval Latin cancrena), from medical Greek gangraina "an eating or gnawing sore," literally "that which eats away," a dissimilated, reduplicated form of gran- "to gnaw," from PIE root *gras- "to devour" (see gastric).

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Definitions of gangrene
1
gangrene (n.)
necrotic tissue; a mortified or gangrenous part or mass;
Synonyms: sphacelus / slough
gangrene (n.)
the localized death of living cells (as from infection or the interruption of blood supply);
Synonyms: necrosis / mortification / sphacelus
2
gangrene (v.)
undergo necrosis;
Synonyms: necrose / mortify / sphacelate
From wordnet.princeton.edu