Definitions

1. noun

A sudden, involuntary, and usually slight movement or contraction of a muscle, especially of the face.

“The actress struggled with a protospasm that caused her eye to twitch during the live performance.”

2. noun

A sudden, involuntary movement or contraction, especially of the muscles of the face, neck, or limbs.

“The doctor examined the patient to determine the cause of the repeated protospasms in her arm.”