1. Abounding in chalk
   "The cretaceous cliffs of Dover are a famous landmark"

1. The geological period from about 145 million to 66 million years ago, marked by the end of the dinosaurs and the rise of flowering plants and modern insects
   - Cretaceous period

1. Of or relating to or denoting the third period of the Mesozoic era
   "Many dinosaur fossils date back to the Cretaceous period"

Type of: geological period, period

Part of: Age of Reptiles, Mesozoic, Mesozoic era

Encyclopedia: Cretaceous