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Từ điển WordNet v3.1 - WordNet Dictionary
Hadean
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 life
• Syn:
Hadean time, Hadean eon, Hadean aeon, Priscoan, Priscoan eon, Priscoan aeon
• Instance Hypernyms:
eon, aeon
of or relating to or characteristic of Hades or Tartarus
• Syn:
Plutonian, Tartarean
• Similar to:
infernal
• Derivationally related forms:
Tartarus (for: Tartarean), Hades
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