Dictionary
tri•the•ism
Pronunciation: (trī'thē-iz"um), [key]—
n. Theol.
belief in three Gods, esp. in the doctrine that the three persons of the Trinity (Father, Son, and Holy Ghost) are three distinct Gods, each an independent center of consciousness and determination.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.