The corresponding Greek term is "οὐσία" the Son is said to be "ὁμοούσιος" with the Father and the change of the bread and wine into the body and blood of Christ is called "μετουσίωσις".
Istilah Yunani yang bersesuaian adalah "οὐσία", Putra dikatakan "ὁμοούσιος" dengan Bapa, sementara perubahan roti dan anggur menjadi tubuh dan darah Kristus disebut "μετουσίωσις".