%intercessor%

n. [ L., a surety: cf. F. intercesseur. ] [ 1913 Webster ]

1. One who goes between, or intercedes; a mediator. (a) One who interposes between parties at variance, with a view to reconcile them. (b) One who pleads in behalf of another. Milton. [ 1913 Webster ]

2. (Eccl.) A bishop, who, during a vacancy of the see, administers the bishopric till a successor is installed. [ 1913 Webster ]