GNU Collaborative International Dictionary of English

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  1.       

    Reptilian , a. Belonging to the reptiles.
    1913 Webster
    Reptilian age (Geol.), that part of geological time comprising the Triassic, Jurassic, and Cretaceous periods, and distinguished as that era in which the class of reptiles attained its highest expansion; -- called also the Secondary or Mezozoic age.
    1913 Webster

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