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1. Oxford Dictionary

   Cretaceous

   • IPA[krɪˈteɪʃəs]

   英式

   • adj.
     relating to or denoting the last period of the Mesozoic era, between the Jurassic and Tertiary periods
   • n.
     the last period of the Mesozoic era, between the Jurassic and Tertiary periods, or the system of rocks deposited during it
2. • 釋義
   • 相關詞

   adj.

   形容詞

   • 1. relating to or denoting the last period of the Mesozoic era, between the Jurassic and Tertiary periods the lizard was believed to have lived during the Cretaceous period

   n.

   名詞

   • 1. the last period of the Mesozoic era, between the Jurassic and Tertiary periods, or the system of rocks deposited during it less than a third of sharks and rays went extinct at the end of the Cretaceous

   Cretaceous–Tertiary boundary

   • ph.
     the division between the Cretaceous and Tertiary periods, about 65 million years ago.

   Oxford American Dictionary

   Cretaceous–Tertiary boundary

   • ph.
     the division between the Cretaceous and Tertiary periods, about 65 million years ago.

   Oxford Dictionary

3. • 更多解釋

   Cretaceous

   • IPA[krəˈtāSHəs]

   美式

   • adj.
     relating to or denoting the last period of the Mesozoic era, between the Jurassic and Tertiary ... the lizard was believed to have lived during the Cretaceous period
   • n.
     the last period of the Mesozoic era, between the Jurassic and Tertiary periods, or the system ... less than a third of sharks and rays went extinct at the end of the Cretaceous

   Oxford American Dictionary