priscoan_eon
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_aeon hadean
Related terms: eon
Similar spelling:   priscoan_aeon
  preconception
  proconvertin
  prisonlike
  precondition
  preconceive
  preconcerted
  preconceived