Meanings
plural myasthenias
- countableuncountablemedicineAbnormal weakness of the muscles; but especially myasthenia gravis.
Synonyms & antonyms
nouna chronic progressive disease characterized by chronic fatigue and muscular weakness (especially in the face and neck); caused by a deficiency of acetylcholine at the neuromuscular junctions
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Ancient Greekἀσθένεια“weakness”
- Englishmyasthenia
From my- (“relating to muscle”) + asthenia (“weakness”), from Ancient Greek ἀσθένεια (asthéneia, “weakness”). By surface analysis, my- (“muscle”) + a- (“not”) + sthen- (“strength”) + -ia (“disease”).
More words from Ancient Greek
Full word history & related roots →Cite this entry
myasthenia. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/myasthenia
“myasthenia.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/myasthenia. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “myasthenia,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/myasthenia.
Source: myasthenia on Wiktionary, CC BY-SA 4.0.