This is not a dictionary! - Search for "priscoan aeon" in The Danish Dictionary
March 1. 2016 from wordnet.princeton.edu
Priscoan aeon — noun — english
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
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