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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 Pre·cam·bri·an /(ˌ)priˈkæmbriən, ˈkem-/
 前寒武紀,前寒武層

From: WordNet (r) 2.0

 Precambrian
      n : the eon following the Hadean time and preceding the
          Phanerozoic eon; from about 3,800 million years ago until
          544 million years ago [syn: Precambrian eon, Precambrian
           aeon, Precambrian period]