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2 definitions found
From: DICT.TW English-Chinese Dictionary 英漢字典
 Ar·che·an /ɑrˈkiən/
 (a.)太古代的
From: WordNet (r) 2.0
 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]