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homoousion

noun, often capitalized
homo·​ou·​si·​on | \ -üz(h)ēˌän, -üs(h)-\
plural -s

Definition of homoousion

: a theological doctrine holding that Christ is of one substance with God the very existence of Christianity … was at stake over the Homoousion— C. H. Turner

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History and Etymology for homoousion

Greek, accusative masculine singular of homoousios

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