Tritheism – Wikipedia

Tritheism (from Greek τριθεΐα, “three divinity”) is a nontrinitarian Christian heresy in which the unity of the Trinity and thus monotheism are denied. It represents more a “possible deviation” than any actual school of thought positing three separate deities. It was usually “little more than a hostile label” applied to those who emphasized the individuality of each hypostasis or divine …

Link: https://en.wikipedia.org/wiki/Tritheism