Definition of: Heterousian

(het′ə·r oomacr ′sē·ə ndot , -rou′sē-) noun
One of a party in the early Christian church that affirmed that the substance of the Son is essentially different from that of the Father; an Arian: distinguished from Homoousian: Also Het′er·ou′si·ast (-ast).
—adjective Pertaining to the Heterousians or their belief.