myasthenia

/ˌˈmaɪəsˌθiniə/

Definitions of myasthenia

1. noun

   any muscular weakness
   type of:

   physical condition, physiological condition, physiological state

   the condition or state of the body or bodily functions
2. noun

   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
   synonyms: myasthenia gravis

   type of:

   disease of the neuromuscular junction

   a disease characterized by impairment of neuromuscular junctions

   autoimmune disease, autoimmune disorder

   any of a large group of diseases characterized by abnormal functioning of the immune system that causes your immune system to produce antibodies against your own tissues