Dictionary
Zur•van•ism
Pronunciation: (zûr'vu-niz"um), [key]—
n.
a Zoroastrian heresy that developed during the late Achaemenian period according to which both Ahura Mazda and Angra Mainyu were offspring of Zurvan.
Also,Zervanism.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.