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

the Cretaceous

noun
 
/ðə krɪˈteɪʃəs/
 
/ðə krɪˈteɪʃəs/
[singular] (geology)
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  1. the period between around 146 to 65 million years ago, when dinosaurs lived (until they died out)Topics Historyc2
ripple effect
noun
 
 
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Change, cause and effect
C2
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