DICT.TW Dictionary Taiwan

 Ar·che·an /ɑrˈkiən/
 (a.)太古代的

 archean
      adj : used of the earliest known rocks [syn: archaean]
      n : the time from 3,800 million years to 2,500 million years
          ago; earth's crust formed; unicellular organisms are
          earliest forms of life [syn: Archean eon, Archean aeon,
           Archeozoic, Archaeozoic, Archeozoic eon, Archaeozoic
          aeon]