Definition of Cretaceous in English:

Cretaceous

adjective

Geology
  • 1Relating to or denoting the last period of the Mesozoic era, between the Jurassic and Tertiary periods.

    • ‘For that matter, extant birds are quite different from Jurassic and Cretaceous birds.’
    • ‘The foothills of the Pyrenees are composed of sedimentary Jurassic and Cretaceous limestones which favour the creation of natural cave systems.’
    • ‘As such, they have been found fossilized in Jurassic and Cretaceous deposits, and have been used to reconstruct paleoclimates.’
    • ‘The Jurassic and Cretaceous together were the age of giant reptiles.’
    • ‘These crucial means of breeding prevailed throughout the Jurassic and Cretaceous times.’
    1. 1.1as noun the Cretaceous The Cretaceous period or the system of rocks deposited during it.

The Cretaceous lasted from about 146 to 65 million years ago. The climate was warm and the sea level rose; the period is characterized especially in NW Europe by the deposition of chalk. The first flowering plants emerged and the domination of the dinosaurs continued, although they died out quite abruptly towards the end of it

Origin

Late 17th century: from Latin cretaceus (from creta ‘chalk’) + -ous.

Pronunciation

Cretaceous

/krɪˈteɪʃəs/