Definition of myositis in English:



mass nounMedicine
  • Inflammation and degeneration of muscle tissue.

    • ‘He is diagnosed with inclusion body myositis, a degenerative muscle disease that slowly destroys muscle mass.’
    • ‘Progressive pulmonary fibrosis occurs in 10 percent of patients and, along with myositis of the respiratory muscles, may lead to hypoxemia.’
    • ‘Rule out other causes such as claudication, disk disease, hypothyroidism, and myositis.’
    • ‘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.’
    • ‘A possible related injury is a torn brachialis muscle with associated myositis.’


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