cretaceous

Adjective
  1. Abounding in chalk (synset 303069137)
  2. Of or relating to or denoting the third period of the Mesozoic era (synset 303068996)
Noun
  1. From 135 million to 63 million years ago;
    End of the age of reptiles;
    Appearance of modern insects and flowering plants (synset 115151313)
    is an instance of: geological period, period - a unit of geological time during which a system of rocks formed
    is a part of: age of reptiles, mesozoic, mesozoic era - from 230 million to 63 million years ago
    same as: cretaceous period

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