Definitions

1. noun

A sudden, involuntary, spasmodic contraction of a muscle, especially one that is painful and occurs in a localized area.

“The doctor examined the patient’s arm after noticing a severe idiospasm that caused the muscle to lock up.”

2. noun

A sudden, uncontrolled muscular spasm or contraction.

“The athlete experienced a severe idiospasm in his leg after the game, which limited his mobility for several hours.”