Source : Webster's Revised Unabridged Dictionary (1913)

Contradistinction \Con`tra*dis*tinc"tion\, n.
   Distinction by contrast.

         That there are such things as sins of infirmity in
         contradistinction to those of presumption is not to be
         questioned.                              --South.

Source : WordNet®

contradistinction
     n : a distinction drawn on the basis of contrast; "sculpture in
         contradistinction to painting"