WordNet (r) 3.0 (2006):

gas phlegmon
    n 1: (pathology) a deadly form of gangrene usually caused by
         clostridium bacteria that produce toxins that cause tissue
         death; can be used as a bioweapon [syn: gas gangrene,
         clostridial myonecrosis, emphysematous gangrene,
         emphysematous phlegmon, gangrenous emphysema, gas
         phlegmon, progressive emphysematous necrosis]