Zoroastrian

Zo*ro*as*tri*an*ism

noun

{bc}a Persian religion founded in the sixth century {sc}b.c.{/sc} by the prophet {a_link|Zoroaster}, promulgated in the Avesta, and characterized by worship of a supreme god Ahura Mazda who requires good deeds for help in his cosmic struggle against the evil spirit Ahriman