Found 2 items, similar to Age of Mammals.
English → English (WordNet) Definition: Age of Mammals Age of Mammals n : approximately the last 63 million years [syn: Cenozoic, Cenozoic era ]
English → English (gcide) Definition: Age of mammals Mammal \Mam"mal\, n.; pl. Mammals. [L. mammalis belonging to the breast, fr. mamma the breast or pap: cf. F. mammal.] (Zo["o]l.) One of the Mammalia. [1913 Webster] Age of mammals. See under Age, n., 8. [1913 Webster]