D defs.my
Entry 2 senses · 2 variants Webster, 1913

Heteroousian

· Het·er·o·ou·si·an · IPA /hɛtəɹəʊˈuːzɪən/
01 a. Having different essential qualities; of a different nature.
  1. 1.
    Having different essential qualities; of a different nature.
02 n. One of those Arians who held that the Son was of a different substance from the Father.
  1. 1.
    One of those Arians who held that the Son was of a different substance from the Father.(Eccl. Hist.)