Wordnet 3.0
NOUN (2)
1.
a 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;
[syn: myasthenia gravis, myasthenia]
2. any muscular weakness;
WordNet (r) 3.0 (2006):
myasthenia
n 1: a 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 [syn: myasthenia gravis,
myasthenia]
2: any muscular weakness