Definition of Jurassic in English:



  • 1Relating to or denoting the second period of the Mesozoic era, between the Triassic and Cretaceous periods.

    • ‘The thickness of the Jurassic and Cretaceous cover sediments is relatively thin and the Variscan was the last major erogenic event to have affected the region.’
    • ‘Of the three Triassic and Jurassic fossiliferous formations, no angular fragments were found from the shell beds.’
    • ‘These crucial means of breeding prevailed throughout the Jurassic and Cretaceous times.’
    • ‘Until recently, sauropod body fossils and ichnofossils were known only from Jurassic and Cretaceous sediments.’
    • ‘Striated fault planes exposed in Mesozoic limestones and Triassic / Jurassic volcanic rocks delineate the surface trace of the fault.’
    1. 1.1as noun the Jurassic The Jurassic period or the system of rocks deposited during it.


Mid 19th century: from French jurassique; named after the Jura Mountains (see Jura).