peritonitis

Definition of peritonitis

peritonitis

(PAYR-ih-tuh-NY-tis)
Inflammation of the peritoneum (tissue that lines the abdominal wall and covers most of the organs in the abdomen). Peritonitis can result from infection, injury, or certain diseases. Symptoms may include swelling of the abdomen, severe pain, and weight loss.

Source: NCI Dictionary of Cancer Terms