SINCE 1828
coeternal
adjective
co·eter·nal
| \ ˌkō-i-ˈtər-nᵊl
\
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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
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