\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 towards the
left; levogyrate, as levulose, left-handed quartz crystals,
etc. [Written also {l[ae]vorotatory}.]