Ho·mo·ou·si·an 
(hō′mō-sē-ən, -zē-)
(hō′mō-sē-ən, -zē-)n.
A Christian supporting the Council of Nicaea's Trinitarian doctrine that Jesus, as Son of God, is consubstantial with God the Father.
[Late Latin homoūsiānus, from homoūsius, of same substance, from Greek homoousios : homo-, homo- + ousiā, substance; see HOMOIOUSIAN.]