Source : Webster's Revised Unabridged Dictionary (1913)

Practicer \Prac"ti*cer\, n. [Often written practiser.]
   1. One who practices, or puts in practice; one who
      customarily performs certain acts. --South.

   2. One who exercises a profession; a practitioner.

   3. One who uses art or stratagem. [Obs.] --B. Jonson.