adjective.
Of or relating to an optically active substance that rotates the plane of polarized light to the left, or counterclockwise.
The Century Dictionary and Cyclopedia
Same as levogyrate.
the GNU version of the Collaborative International Dictionary of English
adjective.
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.