Source : Webster's Revised Unabridged Dictionary (1913)

Derisive \De*ri"sive\, a.
   Expressing, serving for, or characterized by, derision.
   ``Derisive taunts.'' --Pope. -- {De*ri"sive*ly}, adv. --
   {De*ri"sive*ness}, n.

Source : WordNet®

derisively
     adv : in a disrespectful and mocking manner; "`Sorry,' she
           repeated derisively" [syn: {scoffingly}, {derisorily},
           {mockingly}]