U·ni·tar·i·an 
(y′nĭ-târē-ən)
(y′nĭ-târē-ən)n.
1. An adherent of Unitarian Universalism.
2. A monotheist who is not a Christian.
3. A Christian who is not a Trinitarian.
[From New Latin ūnitārius, monotheist, from Latin ūnitās, unity; see UNITY.]
U′ni·tari·an adj.
U′ni·tari·an·ism n.