Black's Law Dictionary (2nd edition)dictionaries

Apocrisarius

In ecclesiastical law. one who answers for another. An officer whose duty was to carry to the emperor mes-sages relating to ecclesiastical matters, and to take back his answer to the petitioners. An officer who gave advice on questions of ecclesiastical law. An ambassador or legate of a pope or bishop. Spelman

Source: Black's Law Dictionary 2nd Ed (1910)