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Sem·i-Ar·i·an(sĕm′ē-ăr′ē-ən, -âr′-, sĕm′ī-)
A member of the Homoiousian party led by the fourth-century ad Bishop Basil of Ancyra.
the belief of a sect that arose in the 4th century that the substances of the Father and Son were similar but nonetheless different. — semi-Arian, n., adj.See also: Theology