Source : Webster's Revised Unabridged Dictionary (1913)

Dextrorotatory \Dex`tro*ro"ta*to*ry\, a. [Dextro- + rotatory.]
   (Chem. & Opt.)
   Turning, or causing to turn, toward the right hand; esp.,
   turning the plane of polarization of luminous rays toward the
   right hand; as, dextrorotatory crystals, sugars, etc. Cf.
   {Levorotatory}.

Source : WordNet®

dextrorotatory
     adj : rotating to the right [syn: {dextrorotary}, {right-handed}]