Source : Webster's Revised Unabridged Dictionary (1913)

Ataxic \A*tax"ic\, a. [Cf. F. ataxique. See {Ataxia}.] (Med.)
   Characterized by ataxy, that is,
   (a) by great irregularity of functions or symptoms, or
   (b) by a want of coordinating power in movements.

   {Ataxic fever}, malignant typhus fever. --Pinel.