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.

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

Origin

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

Pronunciation:

Cretaceous

/krəˈtāSHəs/