Outside of the peritoneal cavity. ... (05 Mar 2000) ... 
Type: Term Pronunciation: eks′tră-per′i-tō-nē′ăl Definitions: 1. Outside of the peritoneal cavity.
adjective, Latin extra = outside, Greek peri = around and teinein = stretched, hence outside the serous membrane stretched around the inside of the abdominal wall and around the viscera.