Oxford Dictionary English lactic acid nounnoun BrE BrE//ˌlæktɪk ˈæsɪd// ; NAmE NAmE//ˌlæktɪk ˈæsɪd// [uncountable] Add to my wordlistjump to other results an acid that forms in sour milk and is also produced in the muscles during hard exerciseSee lactic acid in the Oxford Advanced American DictionaryCheck pronunciation: lactic acid oxfordlearnersdictionaries.com
