(hō′moi·′sē·ən, -ou′sē-) adjective
Alike in nature or characteristics. Also ho′moi·ou′si·ous.

(hō′moi·′sē·ən, -ou′sē-) noun
One of the Arian sectaries of the fourth century who held that Christ was of a similar nature but not of the same nature with the Father: opposed to Homoousian.
—adjective Of or pertaining to the Homoiousians or their beliefs: also Ho′moi·ou′si- ·ous. [<Gk. homoios like + ousia being]
—Ho′moi·ou′si·an·ism noun