priscoan
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_aeon priscoan_eon hadean
Related terms: eon
Similar spelling:   prison
  Presson
  Prussian
  prisoner
  Pressman
  proconsul
  prosom
  prosimian
  prisonlike
  proconsular
  prisonbreak
  prison_term
  prison_farm
  prison_cell
  prison_camp
  press_gang
  preconceive
  prismoid
  present