Cenozoic

from WordNet (r) 3.0 (2006)

Cenozoic
    adj 1: of or relating to or denoting the Cenozoic era
    n 1: approximately the last 63 million years [syn: {Cenozoic},
         {Cenozoic era}, {Age of Mammals}]

from The Collaborative International Dictionary of English v.0.48

Cenozoic \Ce`no*zo"ic\, a. [Gr. ? recent + ? life.] (Geol.)
   Belonging to the most recent division of geological time,
   including the tertiary, or Age of mammals, and the
   Quaternary, or Age of man. [Written also {c[ae]nozoic},
   {cainozoic}, {kainozoic}.] See {Geology}.
   [1913 Webster]

   Note: This word is used by many authors as synonymous with
         Tertiary, the Quaternary Age not being included.
         [1913 Webster]