The Collaborative International Dictionary of English v.0.48:

Experiential \Ex*pe`ri*en"tial\ ([e^]ks*p[=e]`r[i^]*[e^]n"shal),
   a.
   Derived from, or pertaining to, experience. --Coleridge.
   [1913 Webster]

         It is called empirical or experiential . . . because it
         is given to us by experience or observation, and not
         obtained as the result of inference or reasoning.
                                                  --Sir. W.
                                                  Hamilton.
   -- Ex*pe`ri*en"tial*ly, adv. --Dr. H. More.
   [1913 Webster]