Dictionary.net

A collective name for the symptoms indicative of any grave disturbance in the peritoneal cavity (as from intestinal perforation, strangulation, and the passage of gall-stones) ; marked by pain, great exhaustion, anxiety, and distress, vomiting, and the appearances of profound collapse (shallow respiration, cold and pale skin, and soft pulse).

A condition of shock simulating peritonitis.

A sort of false peritonitis in which the symptoms are those of peritonitis with rigidity and tenderness of the abdomen, but there is no inflammation of the peritoneum.