The serous membrane that lines the walls of the abdominal cavity and folds inward to enclose the viscera.
[Middle English, from Late Latin peritonaeum, from Greek peritonaion, from peritonaios, stretched across, from peritonos, stretched around : peri-, peri- + teinein, to stretch.]
peritoneal per'i·to·ne'al adj.peritoneally per'i·to·ne'al·ly adv.




