First Known Use: 1984
Dictionary
Hadean
adjective Ha·de·an \ˈhā-ˌdē-ən, hā-ˈdē-ən\
Definition of HADEAN
: of, relating to, or being the aeon of history between the formation of the solar system and the formation of the first rocks on the earth — see geologic time table
— Hadean noun
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Origin of HADEAN
Hades
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