Source : Webster's Revised Unabridged Dictionary (1913)

Interrogatively \In`ter*rog"a*tive*ly\, adv.
   In the form of, or by means of, a question; in an
   interrogative manner.

Source : WordNet®

interrogatively
     adv 1: in a questioning format
     2: with curiosity; "the baby looked around curiously" [syn: {curiously},
         {inquisitively}]