The Collaborative International Dictionary
laevorotatory
Levorotatory \Le`vo*ro"ta*to*ry\ (-r[=o]"t[.a]*t[-o]*r[y^]), a. [Levo- + rotatory.] (Chem. & Physics) Turning or rotating the plane of polarization of light towards the left; -- applied to crystals and compounds exhibiting optical activity, such as levulose, left-handed quartz crystals, etc. Opposite of dextrorotatory. [Written also l[ae]vorotatory.]
Wiktionary
laevorotatory
a. (alternative spelling of levorotatory English)