Source : Webster's Revised Unabridged Dictionary (1913)

Akinesia \Ak`i*ne"si*a\, n. [Gr. ? quiescence; 'a priv. + ?
   motion.] (Med.)
   Paralysis of the motor nerves; loss of movement. --Foster.

Source : WordNet®

akinesia
     n : motionlessness attributable to a temporary paralysis [syn: {akinesis}]