Definition of "peritoneal" [per•i•to•ne•al]

• Of, relating, or affecting to the peritoneum. (adjective)

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• "Transition of peritoneal mesothelial cells to a mesenchymal phenotype plays an integral role in the angiogenic and fibrotic changes seen in the peritoneum of patients receiving long-term peritoneal dialysis."
• "The peritoneal is the lining of the inside wall of the abdomen."
• "A layer of the "peritoneal" membrane extends from the posterior edge of the muscular expansion which lies between the shell-muscles and from the upper wall of the dilatation of the vena cava, and passes upwards and backwards like a diaphragm to the under surfaces of the gizzard and liver."