Lewis Short
antĕcessor (noun M) : id.
* He that goes before; hence
* In milit. lang., antecessores, the forerunners of the army, the advanced guard (cf. antecursor): speculatores et antecessores, Auct. B. Afr. 12: agminis antecessores, * Suet. Vit. 17.
* In the jurists
* Teachers or professors of law, Cod. Just. 1, 17, 2.
* Tert. thus designates the Holy Ghost, Tert. Virg. Vel. 1 fin.; and also the Apostles,id. adv. Marc. 1, 20; 5, 3.
Charlton T. Lewis, Charles Short, A Latin Dictionary