Library / English Dictionary

    PRISCOAN AEON

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

    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 lifeplay

    Synonyms:

    Hadean; Hadean aeon; Hadean eon; Hadean time; Priscoan; Priscoan aeon; Priscoan eon

    Classified under:

    Nouns denoting time and temporal relations

    Instance hypernyms:

    aeon; eon (the longest division of geological time)

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