Unitarian

noun

1. a person who denies the doctrine of the Trinity, accepting the moral teachings, but rejecting the divinity, of Jesus, and holding that God exists as one person or being
2. a member of a denomination based on these beliefs and characterized by congregational autonomy, tolerance of differing religious views, absence of creed, etc.
   in full Unitarian Universalist

adjective

1. of Unitarians or their doctrines, or adhering to Unitarianism
2. unitary