Christian Theol. having the same substance: said esp. of the persons of the Trinity
Origin of consubstantialMiddle English consubstancial ; from Ecclesiastical Late Latin consubstantialis: see com- and amp; substantial
Of the same substance, nature, or essence.
Origin of consubstantialMiddle English consubstancial, from Late Latin cōnsubstantiālis : Latin com-, com- + Late Latin substantiālis, substantial; see substantial.
(comparative more consubstantial, superlative most consubstantial)