Ju·ras·sic /ʤʊˈræsɪk/
  (a.)侏羅紀的,侏羅系的侏羅紀
  Ju·ras·sic a. Geol. Of the age of the middle Mesozoic, about 190 to 140 million years ago, including, as divided in England and Europe, the Lias, Oölite, and Wealden; -- named from certain rocks of the Jura mountains.  It was noted for the predominance of dinosaurs on land, and the development of the first birds and mammals. -- n. The Jurassic period or formation; -- called also the Jura.
  ◄ ►
  Jurassic
       n : from 190 million to 135 million years ago; dinosaurs;
           conifers [syn: Jurassic period]