Examples from the Web for cenozoic
Poisonous snakes were not evolved until early in the next (Cenozoic) era.
There is a laboratory of invertebrate paleontology of Cenozoic and Mesozoic age, with a corps of paleontologists.
During the early part of the Cenozoic era birds became still more advanced and numerous, with many modern groups represented.
In consequence giant carnivores would find no field for action in the Cenozoic world, and hence they have not been evolved.Dinosaurs|William Diller Matthew
Paleozoic means "ancient life;" Mesozoic, "middle life;" Cenozoic, "recent life."Famous Men of Science|Sarah K. Bolton