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[mez-uh-thee-lee-uh m, mes-, mee-zuh-, -suh-] /ˌmɛz əˈθi li əm, ˌmɛs-, ˌmi zə-, -sə-/
noun, plural mesothelia
[mez-uh-thee-lee-uh, mes-, mee-zuh-, -suh-] /ˌmɛz əˈθi li ə, ˌmɛs-, ˌmi zə-, -sə-/ (Show IPA).
Anatomy, Embryology.
epithelium of mesodermal origin, which lines the body cavities.
Origin of mesothelium
First recorded in 1885-90; meso- + (epi)thelium
Related forms
mesothelial, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for mesothelium


noun (pl) -liums, -lia (-lɪə)
epithelium, derived from embryonic mesoderm lining body cavities
Derived Forms
mesothelial, adjective
Word Origin
from New Latin, from meso- + (epi)thelium
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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mesothelium in Medicine

mesothelium mes·o·the·li·um (měz'ə-thē'lē-əm, měs'-)
n. pl. mes·o·the·li·a (-lē-ə)
The layer of flat cells of mesodermal origin that lines the embryonic body cavity and gives rise to the squamous cells of the peritoneum, pericardium, and pleura.

mes'o·the'li·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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mesothelium in Science
Plural mesothelia
A layer of flattened epithelial cells that lines the membranes of closed body cavities, including the pericardium, pleurae, and peritoneum. Compare endothelium.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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