lactic

adjective

1. of, relating to, or obtained from milk.

adjective

1. relating to or derived from milk

adj.“pertaining to milk,” 1790 (in lactic acid; so called because it was obtained from sour milk), from French lactique, from Latin lactis, genitive of lac “milk” (see lactation) + French -ique. adj.

1. Of, relating to, or derived from milk.