Homoousian

Homoousion (/ˌhɒmoʊˈuːsiən/ HOM-oh-OO-see-ən; Greek: ὁμοούσιος, translit. homooúsios, lit. 'one in being', from ὁμός, homós, "same" and οὐσία, ousía, "being") is a Christian theological doctrine pertaining to the Trinitarian understanding of God. The Nicene Creed describes Jesus as being ὁμοούσιος with God the Father, i.e. Jesus is "one in being" with the Father. The term was adopted at the First Council of Nicaea to clarify the nature of the relationship between Christ and God the Father within the Godhead. In Latin, and in Romance languages that lack a present participle of the verb be, the term is rendered consubstantialis or a translation thereof. It is one of the cornerstones of theology in Nicene Christianity.