Recuse \Re*cuse"\ (r?*k?z"), v. t. [F. r['e]cuser, or L. recusare. See {Recusant}.] (Law) To refuse or reject, as a judge; to challenge that the judge shall not try the cause. [Obs.] --Sir K. Digby.
recuse v 1: disqualify oneself (as a judge, for example) in a particular case 2: challenge or except to a judge as being incompetent or interested, in canon and civil law