Manichaean /(?)/

Man·i·chae·an

Manichaean

n.
  1. A believer in the doctrines of Manes, a Persian of the third century A. D., who taught a dualism in which Light is regarded as the source of Good, and Darkness as the source of Evil.
    The Manichaeans stand as representatives of dualism pushed to its utmost development.
    — Tylor.

Manichaean

a.
  1. Of or pertaining to the Manichaeans.