Apparitor

noun

1. An official who was formerly sent to carry out the orders of a civil or ecclesiastical court.
2. In Roman antiquity, any officer who attended magistrates and judges to execute their orders.
3. Any officer of a civil court, or his servant or attendant.
4. Any one who puts in an appearance; an appearer.
5. Eccles., a messenger or an officer who serves the process of a spiritual court; the lowest officer of an ecclesiastical tribunal.