The Collaborative International Dictionary of English v.0.48:

Practician \Prac*ti"cian\, n. [F. praticien, OF. also
   practicien.]
   One who is acquainted with, or skilled in, anything by
   practice; a practitioner.
   [1913 Webster]

WordNet (r) 3.0 (2006):

practician
    n 1: someone who practices a learned profession [syn:
         practitioner, practician]