I. adjective
also het·er·ou·sian -ən
Etymology: Late Greek heteroousios, heterousios (from Greek hetero-, heter- heter- + ousia ) + English -an
1. : having different essential qualities : being of a different nature
2. often capitalized : of or relating to the heteroousians
II. noun
also heterousian “
( -s )
Usage: often capitalized
: an Arian holding that the Son was of a different substance from the Father — compare homoiousian , homoousian