\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}.