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peritoneum

[per-i-tn-ee-uh m] /ˌpɛr ɪ tnˈi əm/
noun, plural peritoneums, peritonea
[per-i-tn-ee-uh] /ˌpɛr ɪ tnˈi ə/ (Show IPA).
Anatomy
1.
the serous membrane lining the abdominal cavity and investing its viscera.
Origin
1535-1545
1535-45; < Late Latin, variant spelling of peritonaeum < Greek peritónaion, noun use of neuter of peritónaios, synonymous derivative of perítonos stretched round. See peri-, tone, -eous
Related forms
peritoneal, adjective
peritoneally, adverb
preperitoneal, adjective
subperitoneal, adjective
transperitoneal, adjective
transperitoneally, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for peritoneum
  • The under surface is covered by peritoneum, which is reflected on to it from the surface of the liver.
  • Secondary peritonitis is an inflammation of the peritoneum, the tissue lining the abdominal cavity.
  • Another is that hunching increases friction on the peritoneum, a membrane that surrounds the abdominal cavity.
British Dictionary definitions for peritoneum

peritoneum

/ˌpɛrɪtəˈniːəm/
noun (pl) -nea (-ˈniːə), -neums
1.
a thin translucent serous sac that lines the walls of the abdominal cavity and covers most of the viscera
Derived Forms
peritoneal, adjective
Word Origin
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
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Word Origin and History for peritoneum
n.

early 15c., from Late Latin peritonaeum, from Greek peritonaion "abdominal membrane," literally "part stretched over," noun use of neuter of peritonaios "stretched over," from peri- "around" (see peri-) + teinein "to stretch" (see tenet). Related: Peritoneal.

Online Etymology Dictionary, © 2010 Douglas Harper
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peritoneum in Medicine

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.


per'i·to·ne'al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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peritoneum in Science
peritoneum
  (pěr'ĭ-tn-ē'əm)   
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for peritoneum

large membrane in the abdominal cavity that connects and supports internal organs. It is composed of many folds that pass between or around the various organs. Two folds are of primary importance: the omentum, which hangs in front of the stomach and intestine; and the mesentery, which attaches the small intestine and much of the large intestine to the posterior abdominal cavity.

Learn more about peritoneum with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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