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 (hō′mō-o͞o′sē-ən, -zē-)
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.]


(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]
ˌHomoˈousianism n


(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.
2. of or pertaining to the Homoousians or their doctrine.
[1555–65; < Late Greek homooúsi(os) of the same substance]
Ho`mo•ou′si•an•ism, n.
References in periodicals archive ?
How many Christians are eager to learn why Jesus was homoousion, not homoiousion, with God the Father?
He meant that nothing has yet been put forward for a systematic ecclesiology that would parallel the significance of homoousion for trinitarian theology, the Chalcedonian "one person in two natures" for Christology, and the theorem of the supernatural for grace.
Still less should we assume that the non-elite members of Patrophilus's church understood the distinctions between a homoousion and homoiousion creed.
Theologically, John uses such Nicene formulas as Homoousion.
Athanasius insisted that Christ was God, that the homoousion clause of the Creed be understood literally.
This understanding of infallibility takes the away the danger of what Lonergan calls a classicist worldview, one that cannot provide an account of the restatement of the gospel in new cultural settings and in response to new challenges (ARCIC uses the homoousion as an example).
Hanson suggests that the use of ousia in these anathemas is directed explicitly against Nicea and homoousion, but this is overstated unless we believe that Photinus was using Nicea to support his own doctrines, because the belief that the Son was an extension of the Father's ousia is characteristic of Photinus's theology.
Naturally, he penned much against the Arians, both homilies and narratives, while showing a willingness to clarify and compromise over the semantic controversies of Homoiousion ("of like substance"), Homoousion ("consubstantiality"), Hypostasis ("person"), and Ousia ("substance").
Their doctrinal formulation held that Jesus, the Word made flesh, is homoousion (of the same substance, "one in being") with the Father.
Once the church arrived at the clarity of the Nicene homoousion (a growth in understanding of a part of Christianity's substance), it forgot something about how to read many Gospel passages portraying Jesus' human weakness (a deterioration of understanding about an element of Christianity's substance).
Rufinus states elsewhere that Origen had used the word homoousion to designate the one substance of the Father and Son.
presents Torrance's understanding of homoousion, for him the epistemological and ontological "linchpin" of Christian theology, along with the atonement.