Source : Webster's Revised Unabridged Dictionary (1913)

Paleolithic \Pa`le*o*lith"ic\, a. (Geol.)
   Of or pertaining to an era marked by early stone implements.
   The Paleolithic era (as proposed by Lubbock) includes the
   earlier half of the ``Stone Age;'' the remains belonging to
   it are for the most part of extinct animals, with relics of
   human beings.

Source : WordNet®

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}, {Palaeolithic}]