Cretaceous Definition in the Cambridge English Dictionary

Definition of “Cretaceous” - English Dictionary

"Cretaceous" in British English

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uk   /krɪˈteɪ.ʃəs/  us   /kretˈeɪ-/ specialized
from or referring to the ​period of ​time between around 144 and 65 million ​years ago, in which ​plants with ​flowers first ​appeared: the Cretaceous ​period Cretaceous ​rocks
the Cretaceous
noun [S] uk   us  
the Cretaceous ​period
(Definition of Cretaceous from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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