The Collaborative International Dictionary of English v.0.48:
Paleolith \Pa"le*o*lith\ (p[=a]"l[-e]*[-o]*l[i^]th), n. [Paleo- + -lith.] (Geol.) A relic of the Paleolithic era. [1913 Webster]WordNet (r) 3.0 (2006):
paleolith n 1: a stone tool from the Paleolithic age