English

Definition of the Cretaceous noun from the Oxford Advanced Learner's Dictionary

 

the Cretaceous

 noun
noun
BrE BrE//ˌðə krɪˈteɪʃəs//
 
; NAmE NAmE//ˌðə krɪˈteɪʃəs//
 
[singular] (geology)
 
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the period (3) between around 146 to 65 million years ago, when dinosaurs lived (until they died out)