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Cretaceous

DEFINITIONS OF: Cretaceous

1

adj of or relating to or denoting the third period of the Mesozoic era

n from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants

Synonyms:
Cretaceous period
Example of:
geological period, period
a unit of geological time during which a system of rocks formed
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