\Mar"cion*ite\, n. (Eccl. Hist)
A follower of Marcion, a Gnostic of the second century, who
adopted the Oriental notion of the two conflicting
principles, and imagined that between them there existed a
third power, neither wholly good nor evil, the Creator of the
world and of man, and the God of the Jewish dispensation.
--Brande & C.