Source : Webster's Revised Unabridged Dictionary (1913)

Incoordination \In`co*["o]r`di*na"tion\, n.
   Want of co["o]rdination; lack of harmonious adjustment or
   action.

   {Inco["o]rdination of muscular movement} (Physiol.),
      irregularity in movements resulting from inharmonious
      action of the muscles in consequence of loss of voluntary
      control over them.