justiciar /dʒʌˈstɪʃɪˌɑː/

• 1. 

  N the chief political and legal officer from the time of William I to that of Henry III, who deputized for the king in his absence and presided over the kings' courts (威廉一世至亨利三世时期的)首席政法官 (Also called justiciary) [English legal history]