Zo·ro·as·tri·an a. Of or pertaining to Zoroaster, or his religious system.
Zo·ro·as·tri·an n. A follower of Zoroaster; one who accepts Zoroastrianism.
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Zoroastrian
adj : of or pertaining to Zoroaster or the religion he founded
n : follower of Zoroaster and Zoroastrianism