deflective

from WordNet (r) 3.0 (2006)

deflective
    adj 1: capable of changing the direction (of a light or sound
           wave) [syn: {deflective}, {refractive}]

from The Collaborative International Dictionary of English v.0.48

Deflective \De*flect"ive\, a.
   Causing deflection.
   [1913 Webster]

   {Deflective forces}, forces that cause a body to deviate from
      its course.
      [1913 Webster]