Zoroastrianism
    n 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)
         [syn: Zoroastrianism, Mazdaism]

Zoroastrianism \Zo`ro*as"tri*an*ism\, n.
   The religious system of Zoroaster, the legislator and prophet
   of the ancient Persians, which was the national faith of
   Persia; mazdeism. The system presupposes a good spirit
   (Ormuzd) and an opposing evil spirit (Ahriman). Cf. Fire
   worship, under Fire, and Parsee.
   [1913 Webster]