Cretaceous period

/krəˌteɪʃəs ˌpɪriəd/
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Other forms: Cretaceous periods

Definitions of Cretaceous period
  1. noun
    the period of geologic time from about 145 to 66 million years ago; the last period of the Mesozoic era
    synonyms: Cretaceous
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    example of:
    geological period, period
    a unit of geological time during which a system of rocks formed
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