Source : WordNet®

palaeolithic
     adj : of or relating to the second period of the Stone Age
           (following the eolithic); "paleolithic artifacts" [syn:
            {paleolithic}]
     n : second part of the Stone Age beginning about 750,00 to
         500,000 years BC and lasting until the end of the last
         ice age about 8,500 years BC [syn: {Paleolithic Age}, {Paleolithic}]