Definition of Jurassic adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//dʒʊˈræsɪk//
; NAmE NAmE//dʒʊˈræsɪk//
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of the period between around 208 to 146 million years ago, when the largest known dinosaurs lived; of the rocks formed during this time Word Originmid 19th cent.: from French jurassique; named after the Jura Mountains, in France and Switzerland.
See the Oxford Advanced American Dictionary entry: Jurassic

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