Webster's 1913 Dictionary
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.
New American Oxford Dictionary
dextrorotatory
dex tro ro ta to ry |ˌdekstrəˈrōtəˌtôrē ˌdɛkstrəˈroʊdəˌtɔri | ▶adjective Chemistry (of a compound ) having the property of rotating the plane of a polarized light ray to the right, i.e., clockwise facing the oncoming radiation. The opposite of levorotatory. DERIVATIVES dex tro ro ta tion |-ˌrōˈtāSHən |noun
Oxford Dictionary
dextrorotatory
dextrorotatory |ˌdɛkstrəʊˈrəʊtət (ə )ri | ▶adjective Chemistry (of a compound ) having the property of rotating the plane of a polarized light ray to the right, i.e. clockwise facing the oncoming radiation. The opposite of laevorotatory. DERIVATIVES dextrorotation noun
The Wordsmith Dictionary