Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun cretaceous_period

1 sense of cretaceous period

Sense 1
Cretaceous, Cretaceous period -- (from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants)
       INSTANCE OF=> period, geological period -- (a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods")