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.

Source: Webster's Revised Unabridged Dictionary (1913)