The Collaborative International Dictionary of English v.0.48:

Levogyrate \Le`vo*gy"rate\ (-j[imac]"r[asl]t), a. [Levo- +
   gyrate.] (Chem., Physics, Biochem.)
   Turning or twisting the plane of polarization of light
   towards the left, as levulose, levotartaric acid, etc.;
   levorotatory. [Written also l[ae]vogyrate.]
   [1913 Webster]