pyopneumoperitonitis

[pī′ō-nōō′mō-pĕr′ĭ-tn-ītĭs]
n.
  1. Suppurative peritonitis accompanied by gas produced by gas-forming microorganisms or introduced from a ruptured bowel.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.