Lewis & Short

sā̆crĭfĭcŭlus, i, m. [sacrifico], one who conducts the sacrifices, a sacrificer, sacrificing priest: sacrificuli ac vates ceperant hominum mentes, Liv. 25, 1; Suet. Dom. 1 (for which, sacricolae, Tac. H. 3, 74).
In apposition: rex, a high-priest, Liv. 2, 2, 1; cf. id. 6, 41, 9; v. rex, I.: vates, id. 35, 48 fin.