archaeozoic

Adjective

• of or belonging to earlier of two divisions of the Precambrian era
  • archeozoic life forms
    

Noun

• the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life

Related words

• Synonyms: 
  archeozoic , Archean , Archean eon , Archean aeon , Archeozoic , Archaeozoic , Archeozoic eon , Archaeozoic aeon