Definition, Meaning & Synonyms

cretaceous

Adjective

/krɪˈteɪʃəs/

Definition

Relating to or denoting the last period of the Mesozoic era, from about 145 to 66 million years ago, characterized by the dominance of dinosaurs and the appearance of flowering plants.

Examples

The Cretaceous period was a time of great ecological diversity.
Fossils from the Cretaceous provide insight into the development of early mammals.
The chalk formations in many parts of Europe date back to the Cretaceous period.

Meaning

The Cretaceous period is known for significant geological and biological changes, including the rise of mammals and birds, and is marked by the mass extinction event that eliminated the dinosaurs.