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adjectiveof or relating to or characteristic of Hades or Tartarus
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nounthe 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
Definition that contains hadean
- precambrian aeon the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
- precambrian eon the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
- precambrian period the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
- precambrian the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago