1. Era spanning approximately the last 66 million years, characterized by the dominance of mammals
   "The Cenozoic era began after the extinction of the dinosaurs";
   - Cenozoic, Age of Mammals, Cainozoic

Type of: era, geological era

Part of: Phanerozoic, Phanerozoic aeon, Phanerozoic eon

Encyclopedia: Cenozoic era