Search Result for "age of mammals":
Wordnet 3.0

NOUN (1)

1. approximately the last 63 million years;
[syn: Cenozoic, Cenozoic era, Age of Mammals]



The Collaborative International Dictionary of English v.0.48:

Mammal \Mam"mal\, n.; pl. Mammals. [L. mammalis belonging to
   the breast, fr. mamma the breast or pap: cf. F. mammal.]
   (Zool.)
   One of the Mammalia.
   [1913 Webster]

   Age of mammals. See under Age, n., 8.
      [1913 Webster]


WordNet (r) 3.0 (2006):

Age of Mammals
    n 1: approximately the last 63 million years [syn: Cenozoic,
         Cenozoic era, Age of Mammals]