archaeozoic_era
1. [ noun ] (geology) the time prior to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Synonyms: archean archean_era archeozoic archeozoic_era archaeozoic
Related terms: era Precambrian
2. [ noun ] (geology) the time from 1.5 billion to 5 billion years ago; earth's crust formed; unicellular organisms are earliest forms of life
Synonyms: Archaeozoic Archeozoic_era archaeozoic_aeon archean archean_aeon archean_eon archeozoic_eon Archeozoic
Related terms: eon era Precambrian
Similar spelling:   Archeozoic_era
  archaeozoic_aeon
  archeozoic_eon