Pleistocene

from WordNet (r) 3.0 (2006)
Pleistocene
    n 1: from two million to 11 thousand years ago; extensive
         glaciation of the northern hemisphere; the time of human
         evolution [syn: {Pleistocene}, {Pleistocene epoch},
         {Glacial epoch}]
from The Collaborative International Dictionary of English v.0.48
Pleistocene \Pleis"to*cene\, a. [Gr. ? most + ? new.] (Geol.)
   Of or pertaining to the epoch, or the deposits, following the
   Tertiary, and immediately preceding man. -- n. The
   Pleistocene epoch, or deposits.
   [1913 Webster]
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