Relating to the configuration of l-glyceraldehyde, a compound chosen as the basis for stereochemical nomenclature because it is the simplest carbohydrate that can form optical isomers: l-lactic acid.
limes (used with a lower case letter or a plus sign, or used with a subscript letter or plus sign as a symbol for various doses of toxin)
or l liter
l- pref. l-
To the left; levo: l-lactic acid.