mal·o·lac·tic 
(măl′ō-lăktĭk, mālō-)
(măl′ō-lăktĭk, mālō-)adj.
Converting malic acid to lactic acid, as in a bacterial fermentation process that occurs in many wines usually after the initial fermentation of sugars to alcohol.
[MAL(IC ACID) + LACTIC (ACID).]