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1. Oxford Dictionary

   Proterozoic

   • IPA[ˌprəʊt(ə)rə(ʊ)ˈzəʊɪk]

   英式

   • adj.
     relating to or denoting the aeon that constitutes the later part of the Precambrian, between the Archaean aeon and the Cambrian period, in which the earliest forms of life evolved
   • n.
     the aeon that constitutes the later part of the Precambrian, between the Archaean aeon and the Cambrian period, or the system of rocks deposited during it
2. • 釋義

   adj.

   形容詞

   • 1. relating to or denoting the aeon that constitutes the later part of the Precambrian, between the Archaean aeon and the Cambrian period, in which the earliest forms of life evolved Proterozoic rocks occur in all the great Precambrian cratons of the world

   n.

   名詞

   • 1. the aeon that constitutes the later part of the Precambrian, between the Archaean aeon and the Cambrian period, or the system of rocks deposited during it we know very little of the geography of the Proterozoic
3. • 更多解釋

   Proterozoic

   • IPA[ˌprōdərōˈzōik]

   美式

   • adj.
     relating to or denoting the eon that constitutes the later part of the Precambrian, between the ... Proterozoic rocks occur in all the great Precambrian cratons of the world
   • n.
     the eon that constitutes the later part of the Precambrian, between the Archean eon and the ... we know very little of the geography of the Proterozoic

   Oxford American Dictionary