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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.]
Homoousian(ˌhəʊməʊˈuːsɪən; -ˈaʊ-; ˌhɒm-)
(Theology) a Christian who believes that the Son is of the same substance as the Father. Compare Homoiousian
(Theology) of or relating to the Homoousians
[C16: from Late Greek homoousios of the same substance, from Greek homo- + ousia nature]
Ho•mo•ou•si•an(ˌhoʊ moʊˈu si ən, -ˈaʊ-, ˌhɒm oʊ-)
1. a member of a 4th-century A.D. church party that maintained that the essence or substance of the Father and the Son is the same.adj.
2. of or pertaining to the Homoousians or their doctrine.
[1555–65; < Late Greek homooúsi(os) of the same substance]