The Collaborative International Dictionary
Coeternal
Coeternal \Co`e*ter"nal\, a. Equally eternal. -- Co`e*ter"nal*ly, adv.
Hail, holy Light, offspring of Heaven first born!
Or of the Eternal coeternal beam.
--Milton.
Wiktionary
coeternal
a. jointly or equally eternal
Usage examples of "coeternal".
He has one Son who is coeternal with Him, and together with the Holy Spirit they .
This room has been the scene of the happiest hours of my life in which my coeternal companion, incased in the flesh of a real man, plighted his everlasting love and devotion to me.