|—n , pl -nea, -neums|
|a thin translucent serous sac that lines the walls of the abdominal cavity and covers most of the viscera|
|[C16: via Late Latin from Greek peritonaion, from peritonos stretched around, from |
peritoneum per·i·to·ne·um or per·i·to·nae·um (pěr'ĭ-tn-ē'əm)
n. pl. per·i·to·ne·a or per·i·to·nae·a (-tn-ē'ə)
The serous sac consisting of mesothelium and a thin layer of irregular connective tissue that lines the abdominal cavity, covers most of the viscera contained therein, and itself forms two cavities, the peritoneal and the omental bursa, which are connected by the epiploic foramen.
|peritoneum (pěr'ĭ-tn-ē'əm) Pronunciation Key
The membrane that lines the walls of the abdomen and the pelvis (called the parietal peritoneum) and encloses the abdominal and pelvic organs (called the visceral peritoneum.) The space between the two, the peritoneal cavity, fills with inflammatory cells and pus when the peritoneum becomes infected.