coeternal

adjective
co·eter·nal | \ˌkō-i-ˈtər-nᵊl \

Definition of coeternal 

: equally or jointly eternal … the old 19th-century view that … if life and matter are coeternal, there is no problem of the origin of life to be figured out.— Carl Sagan

Other Words from coeternal

coeternally adverb
existing coeternally
coeternity noun

First Known Use of coeternal

14th century, in the meaning defined above

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The first known use of coeternal was in the 14th century

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