Marcionite /(mär"shŭn*īt)/

Mar·cion·ite

Marcionite

n.
  1. 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. (Eccl. Hist)