[der-mat-uh-mahy-uh-sahy-tis, dur-muh-toh-]
noun Pathology.
an inflammatory disease of connective tissues, manifested by skin inflammation and muscle weakness.

1895–1900; dermato- + myositis inflammation of muscle tissue, irregular < Greek myós (genitive of mŷs muscle, mouse) + -itis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

dermatomyositis der·ma·to·my·o·si·tis (dûr'mə-tō-mī'ə-sī'tĭs)
A progressive inflammatory condition characterized by muscular weakness, a skin rash, and edema of the eyelids and periorbital tissue.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Britannica


chronic progressive inflammation of the skin and muscles, particularly the muscles of the shoulders and pelvis.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Dermatomyositis, a rare inflammatory muscle disease, may be triggered by viral infection-or something more sinister.
Dermatomyositis is a muscle disease characterized by inflammation and a skin rash.
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