[mez-uh-thee-lee-oh-muh, mes-, mee-zuh-, -suh-]
noun, plural mesotheliomas, mesotheliomata [mez-uh-thee-lee-oh-muh-tuh, mes-, mee-zuh-, -suh-] . Pathology.
a malignant tumor of the covering of the lung or the lining of the pleural and abdominal cavities, often associated with exposure to asbestos.

1905–10; mesotheli(um) + -oma Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
mesothelioma (ˌmɛzəʊˌθiːlɪˈəʊmə)
n , pl -mata, -mas
a tumour of the epithelium lining the lungs, abdomen, or heart: often associated with exposure to asbestos dust
[C20: from mesotheli(um) + -oma]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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American Heritage
Medical Dictionary

mesothelioma mes·o·the·li·o·ma (měz'ə-thē'lē-ō'mə, měs'-)
n. pl. mes·o·the·li·o·mas or mes·o·the·li·o·ma·ta (-mə-tə)
A rare neoplasm derived from the lining cells of the pleura and peritoneum and growing as a thick sheet composed of spindle cells or fibrous tissue covering the viscera.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
But the long lag between exposure and the development of mesothelioma means that the number of cases is still rising.
Most workers who contracted serious illnesses-lung diseases and mesothelioma, a painful form of cancer-have died.
Results from clinical trials concerning mesothelioma.
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