Age of Mammals


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to Age of Mammals: Age of Reptiles

Age of Mammals

[′āj əv ′mam·əlz]
(geology)
An informal designation of the Cenozoic era of geologic time.
References in periodicals archive ?
Few mammal fossils have been found in South America from this time period, before the age of dinosaurs gave way to the age of mammals. Scientists hope the discovery will reveal more about whether early mammals evolved differently in North and South America.
Justin Jennings, culminating in a celebration in the James and Louise Temerty Galleries of the Age of Dinosaurs and the Reed Gallery of the Age of Mammals.
The Age of Mammals: The Tertiary Period (65,000,000-1,800,000 years ago).