priscoan_aeon | ||
1. | [ noun ] 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 | |
Synonyms: | hadean_aeon hadean_eon hadean_time priscoan priscoan_eon hadean | |
Related terms: | eon | |
Similar spelling: |
priscoan_eon precambrian_aeon prisonlike precondition |