dextrorotatory
Dex`tro*ro"ta*to*ry, a. Etym: [Dextro- + rotatory.] (Chem. & Opt.) Defn: 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.