[air-ee-uh-niz-uh
m, ar-] 
| the doctrine, taught by Arius, that Christ the Son was not consubstantial with God the Father. |
| Ar·i·an·ism (âr'ē-ə-nĭz'əm, ār'-) n. The doctrines of Arius, denying that Jesus was of the same substance as God and holding instead that he was only the highest of created beings, viewed as heretical by most Christian churches. |