HyperDic: priscoan_aeon

English > 1 sense of the expression Priscoan aeon:
NOUNtimePriscoan aeon, Hadean, Hadean time, Hadean eon, Hadean aeon, Priscoan, Priscoan eonthe 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)
English > Priscoan aeon: 1 sense > noun 1, time
MeaningThe 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.
SynonymsHadean, Hadean time, Hadean eon, Hadean aeon, Priscoan, Priscoan eon
Instance ofeon, aeonThe longest division of geological time

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