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

Origin

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

Pronunciation

Cretaceous

/krɪˈteɪʃəs/