Meaning of diadochokinesia

di•ad•o•cho•ki•ne•sia

Pronunciation: (dī-ad"u-kō-ki-nē'zhu, -zhē-u, -zē-u, -kī-), [key]
— n. Med.
  1. the normal ability to perform rapidly alternating muscular movements, as flexion and extension.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.