noun, plural per·i·to·ne·ums, per·i·to·ne·a [per-i-tn-ee-uh] /ˌpɛr ɪ tnˈi ə/. Anatomy.
the serous membrane lining the abdominal cavity and investing its viscera.
Origin of peritoneum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -nea (-ˈniːə) or -neums
a thin translucent serous sac that lines the walls of the abdominal cavity and covers most of the viscera
Word Origin for peritoneum
C16: via Late Latin from Greek peritonaion, from peritonos stretched around, from peri- + tenein to stretch
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper
n. pl. per•i•to•ne•a
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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.