Source : Webster's Revised Unabridged Dictionary (1913)

Reusation \Re`u*sa"tion\ (r?k`?*z?"sh?n), n. [L. recusatio: cf.
   F. r['e]cusation.]
   1. Refusal. [Obs.]

   2. (Old Law) The act of refusing a judge or challenging that
      he shall not try the cause, on account of his supposed
      partiality. --Blackstone.