01 n. An ancient Persian religion, esp. as represented by the Magi; a form of Zoroastrianism.
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An ancient Persian religion, esp. as represented by the Magi; a form of Zoroastrianism.“This system we shall call 'Persism', in order to free ourselves of the popular associations still connected with such terms as magism, Parseeism, and so forth; meaning by 'Persism' the teaching of Zarathustra as it affected the Greek and Latin world.” — E. Vernon Arnold.