Langimage
English

homoiousianism

|ho-moi-ou-si-an-ism|

C2

🇺🇸

/ˌhoʊmoʊɪˈjuːziənɪzəm/

🇬🇧

/ˌhɒməʊɪˈjuːziənɪzəm/

similar-substance doctrine

Etymology
Etymology Information

'homoiousianism' originates from Greek, specifically the word 'homoiousios', where 'homoios' meant 'similar' and 'ousia' meant 'essence'.

Historical Evolution

'homoiousios' was Latinized (e.g. 'homoiousianismus') in ecclesiastical and theological Latin and later entered English as 'homoiousianism'.

Meaning Changes

Initially it described the idea 'similar in essence', but over time it came to denote specifically the 4th-century theological doctrine called 'homoiousianism'.

Meanings by Part of Speech

Noun 1

a 4th-century theological position holding that the Son is of similar substance (homoiousios) to the Father, as opposed to being of the same substance (homoousios).

Homoiousianism taught that the Son was of a similar substance to the Father rather than the same substance.

Synonyms

Semi-Arianismhomoiousios doctrine

Antonyms

Last updated: 2025/12/24 19:05