Pronunciation: per'i-to-ne'um, -a
Definition: The serous sac, consisting of mesothelium and a thin external layer of irregular connective tissue, that lines the abdominopelvic cavity and covers most of the viscera contained therein; it forms two sacs: the peritoneal (or greater) sac and the omental bursa (lesser sac) connected by the omental foramen.
Synonym(s): membrana abdominis
[Mod. L. fr. G. peritonaion, fr. periteino, to stretch over]
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