transperitoneal

peritoneum 

Main Entry: peri·to·ne·um
Variant: or chiefly British peri·to·nae·um /"per-&t-^&n-'E-&m/
Function: noun
Inflected Form: plural peri·to·ne·ums or chiefly British peri·to·nae·ums /-'E-&mz/ or peri·to·nea or chiefly British peri·to·naea /-'E-&/
: the smooth transparent serous membrane that lines thecavity of the abdomen of a mammal, is folded inward over the abdominal and pelvic viscera, and consists of an outer layer closely adherent to the walls of the abdomen and an inner layer that folds toinvest the viscera —see PARIETAL PERITONEUM, VISCERAL PERITONEUM; —compare MESENTERY 1

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.

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per'i·to·ne'al adj.

peritoneum   (pěr'ĭ-tn-ē'əm)  Pronunciation Key  Plural peritonea 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.