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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“Coeternal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coeternal. Accessed 7 Mar. 2021.
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Time Traveler for coeternal
The first known use of coeternal was in the 14th century
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