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2 definitions found

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

 Pro·te·ro·zo·ic /ˌprɑtərəˈzoɪk, ˌpro-/
 原生地(a.)原生代的

From: WordNet (r) 2.0

 proterozoic
      adj : formed in the later of two divisions of the Precambrian era;
            "proterozoic life forms"
      n : from 2,500 to 544 million years ago; bacteria and fungi;
          primitive multicellular organisms [syn: Proterozoic eon,
           Proterozoic aeon]