Homoousian
Homoousian (/ˌhɒmoʊˈaʊsiən/ HOM-oh-OW-see-ən; Ancient Greek: ὁμοούσιος, from the Ancient Greek: ὁμός, homós, "same" and Ancient Greek: οὐσία, ousía, "essence, being") is a technical theological term used in discussion of the Christian understanding of God as Trinity. The Nicene Creed describes Jesus as being homooúsios with God the Father — that is, they are of the "same substance" and are equally God. This term, adopted by the First Council of Nicaea, was intended to add clarity to the relationship between Christ and God the Father within the Godhead. The term is rendered "consubstantialis" in Latin and in related terms in other Latin-derived languages. It is one of the cornerstones of theology in all Churches that adhere to the Nicene Creed.
Read more about Homoousian.