Source : Webster's Revised Unabridged Dictionary (1913)

Supersedure \Su*per*se"dure\, n.
   The act of superseding, or setting aside; supersession; as,
   the supersedure of trial by jury. --A. Hamilton.

Source : WordNet®

supersedure
     n : act of replacing one person or thing by another especially
         one held to be superior [syn: {supersession}]