English
heteroousianism
From heteroousian + -ism.
Formed from heteroousian + -ism
Ancient Greek ἑτεροουσιος ‘of a different nature’
English heteroousian
Today it means
noun The belief that the first and second persons of the Trinity have different essence or substance.
Language periods are conventional ranges, not dates for this word.
Etymograph / heteroousianism