Source : Webster's Revised Unabridged Dictionary (1913)

Explorative \Ex*plor"a*tive\, a.
   Exploratory.

Source : WordNet®

explorative
     adj : serving in or intended for exploration or discovery; "an
           exploratory operation"; "exploratory reconnaisance";
           "digging an exploratory well in the Gulf of Mexico";
           "exploratory talks between diplomats" [syn: {exploratory}]
           [ant: {nonexploratory}]