Levo- \Le"vo-\ (l[=e]"v[-o]-).
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-.]
Source: Webster's Revised Unabridged Dictionary (1913)
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