Definition of homoiousian in English:

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Pronunciation: /ˌhɒmɔɪˈuːsɪən/
Pronunciation: /ˌhɒmɔɪˈaʊsɪən/ Pronunciation: /ˌhɒmɔɪˈuːzɪən/ Pronunciation: /ˌhɒmɔɪˈaʊzɪən/


A person who held that God the Father and God the Son are of like but not identical substance. Compare with homoousian.
Example sentences
  • The arguments between the homoiousian and homoousians would be hysterically ridiculous if it weren't for the amount of blood shed over the letter ‘i’.
  • Constantius at first supported these homoiousians but soon transferred his support to the homoousians, led by Acacius, who affirmed that the Son was ‘like’ the Father.
  • In 381, the Council of Constantinople reaffirmed the credo of Nicaea and condemned the semi-Arians, the homoiousians.


Late 17th century (as an adjective in the sense 'of similar but not identical substance'): via ecclesiastical Latin from Greek homoiousios, from homoios 'like' + ousia 'essence, substance'. The noun dates from the mid 18th century.

For editors and proofreaders

Line breaks: hom¦oio|us¦ian

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