Source : Webster's Revised Unabridged Dictionary (1913)

Oxy- \Ox"y-\ (Chem.)
   A prefix, also used adjectively, designating:
   (a) A compound containing oxygen.
   (b) A compound containing the hydroxyl group, more properly
       designated by hydroxy-. See {Hydroxy-}.

   {Oxy acid}. See {Oxyacid} (below).