Definition of "polymyositis" []

• An inflammatory disease affecting multiple muscles (noun)

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• "Alesandra, forty-one, had an excruciating, often fatal autoimmune disorder called polymyositis."
• "Then his legs started giving way, and on top of that he was found to have an autoimmune disease, polymyositis, in which the body destroys its own muscle tissue."
• "In a 1990 Pennsylvania study, cases of polymyositis, an autoimmune disease of the muscles, resulting in severe muscle weakness, more than tripled between 1973 and 1982."