/ Dictionary / Index H Homoiousian: Meaning and Definition of Find definitions for: Ho•moi•ou•si•an Pronunciation: (hō"moi-'sē-un, -ou'-), [key] — n. 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. relating to the Homoiousians or their doctrine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. homoiothermal homolecithal Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language