noun (n)

• necrotic tissue; a mortified or gangrenous part or mass(noun.state)

  Synonym:
  gangrene, slough
  

  source: wordnet30
• the localized death of living cells (as from infection or the interruption of blood supply)(noun.phenomenon)

  Synonym:
  gangrene, mortification, necrosis
  

  source: wordnet30
• Gangrenous part; gangrene; slough.(noun)

  source: webster1913