Zoroastrianism Zoroastrianism /ˌzɔːroʊˈæstriənɪzəm/

noun

1. System of religion founded in Persia in the 6th century BC by Zoroaster; set forth in the Zend-Avesta; based on concept of struggle between light (good) and dark (evil)  ( Mazdaism , Zoroastrianism )
   system of religion founded in Persia in the 6th century BC by Zoroaster; set forth in the Zend-Avesta; based on concept of struggle between light (good) and dark (evil)