Definition of myositis in English:


Pronunciation /ˌmīōˈsīdəs/ /ˌmaɪoʊˈsaɪdəs/


  • Inflammation and degeneration of muscle tissue.

    ‘Imagine if people taking the pill have higher rates of hepatitis, bleeding ulcers, myositis (muscle inflammation), bradycardia, and acute renal failure all at the same time.’
    • ‘Progressive pulmonary fibrosis occurs in 10 percent of patients and, along with myositis of the respiratory muscles, may lead to hypoxemia.’
    • ‘A possible related injury is a torn brachialis muscle with associated myositis.’
    • ‘Rule out other causes such as claudication, disk disease, hypothyroidism, and myositis.’
    • ‘He is diagnosed with inclusion body myositis, a degenerative muscle disease that slowly destroys muscle mass.’


Early 19th century formed irregularly from Greek mus, mu- ‘muscle’+ -itis.