Meaning of ditheism

di•the•ism

Pronunciation: (dī'thē-iz"um), [key]
— n.
  1. the doctrine of or belief in two equally powerful gods.
  2. belief in the existence of two independent antagonistic principles, one good and the other evil, as in Zoroastrianism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.