| 释义 | Hadean eonThesaurus
 EncyclopediaSeeHadean| Noun | 1. | Hadean eon - the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of lifeHadean, Hadean aeon, Hadean time, Priscoan, Priscoan aeon, Priscoan eon | 
 Hadean eonRelated to Hadean eon: Archean eon, Proterozoic eon, Phanerozoic eon
 Synonyms for Hadean eonnoun the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago)SynonymsHadeanHadean aeonHadean timePriscoanPriscoan aeonPriscoan eon
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