The Collaborative International Dictionary
Expiator
Expiator \Ex"pi*a`tor\, n. [L.] One who makes expiation or atonement.
Wiktionary
expiator
n. One who makes expiation or atonement.
Usage examples of "expiator".
And because Luke purposes to delineate Christ as the expiator of our sins, he makes no mention of these women.
Agreeing in some points of his history, they all celebrate his life of penitence, his mortifications, his fastings, his functions of mediator and expiator, the enmity between him and another god, his adversary, their battles, and his ascendency.