Meaning of Homoiousian

Ho•moi•ou•si•an

Pronunciation: (hō"moi-'sē-un, -ou'-), [key]
— n.
  1. a member of a 4th-century a.d. church party that maintained that the essence of the Son is similar to, but not the same as, that of the Father.
—adj.
  1. relating to the Homoiousians or their doctrine.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.