jurassic Meaning, Definition & Usage

  1. noun from 190 million to 135 million years ago; dinosaurs; conifers
    Jurassic period.
  2. adjective of or relating to or denoting the second period of the Mesozoic era

WordNet


Ju*ras"sic adjective
Definitions
  1. (Geol.) Of the age of the middle Mesozoic, including, as divided in England and Europe, the Lias, Oölite, and Wealden; -- named from certain rocks of the Jura mountains. -- n. The Jurassic period or formation; -- called also the Jura.

Webster 1913