jurassic

2 definitions found

jurassic - Collaborative International Dictionary of English v.0.48 :

  Jurassic \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, O["o]lite, 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.
     [1913 Webster +PJC]

jurassic - WordNet (r) 2.1 (2005) :

  Jurassic
      adj 1: of or relating to or denoting the second period of the
             Mesozoic era
      n 1: from 190 million to 135 million years ago; dinosaurs;
           conifers [syn: Jurassic, Jurassic period]