levo

Levo- \Le"vo-\ (l[=e]"v[-o]-) pref. A prefix from L. laevus, meaning: (a) Pertaining to, or toward, the left; as, levorotatory. (b) (Chem. & Opt.) Turning the plane of polarized light to the left; as, levotartaric acid; levoracemic acid; levogyratory crystals, etc. [Written also {l[ae]vo-}.] [1913 Webster]