Pa?le?o?lith?ic (?pe? li ??l?? ?k; esp. Brit. ?pæl i-) adj. (sometimes l.c.) of, designating, or characteristic of the early phase of the Stone Age: usu. divided into three periods (Lower Paleolithic, c2,000,000?c200,000 b.c., Middle Paleolithic, c150,000?c40,000 b.c., Upper Paleolithic, c40,000?c10,000 b.c.). [1860?65] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.