What is "adiadochokinesia"

n. A dyskinesia characterized by the inability to perform the rapid alternating movements of diadochokinesia.

Adiadochokinesia is a dyskinesia consisting of inability to perform the rapid alternating movements of diadochokinesia. Called also adiadochocinesia, adiadochokinesis, and adiadokokinesia.
Compare with dysdiadochokinesia, which is an impairment of the ability to perform rapidly alternating movements.