Webster's Revised Unabridged Dictionary · 1913

Coadjutor

Coadjutor , noun

[L. See Co-, and Aid.]

1.
One who aids another; an assistant; a coworker.
Craftily outwitting her perjured coadjutor. — Sheridan
2.
(Roman Catholic Church) The assistant of a bishop or of a priest holding a benefice.