Definition of myasthenia in English:

myasthenia

Line breaks: my¦as|the¦nia
Pronunciation: /ˌmʌɪəsˈθiːnɪə
 
/

noun

[mass noun]
  • 1A condition causing abnormal weakness of certain muscles.
    More example sentences
    • Louise suffers from osteoporosis and myasthenia, a muscle weakness which means she needs to sleep for about four hours after every riding lesson.
    • Surgical removal of the thymus gland is performed in patients with a thymoma and can also help some other patients, especially those who develop myasthenia before the age of about 45.
    • Unlike myasthenia, however, it is associated with improved strength with repeated muscle activity.
  • 1.1 (in full myasthenia gravis /ˈgrɑːvɪs, ˈgravɪs/) A rare chronic autoimmune disease marked by muscular weakness without atrophy, and caused by a defect in the action of acetylcholine at neuromuscular junctions.
    More example sentences
    • It has been useful in treating autoimmune diseases such as myasthenia gravis.
    • The drug was first approved by the FDA as a treatment for myasthenia gravis, a chronic neuromuscular disease.
    • Congenital myasthenia gravis is rare and can be excluded by maternal and neonatal history.

Origin

mid 19th century: modern Latin, from Greek mus 'muscle' + asthenia.

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