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.
© Webster 1913.