Oxford Dictionary English citric acid nounnoun BrE BrE//ˌsɪtrɪk ˈæsɪd// ; NAmE NAmE//ˌsɪtrɪk ˈæsɪd// [uncountable] Add to my wordlistjump to other results a weak acid found in the juice of lemons and other sour fruitsSee citric acid in the Oxford Advanced American DictionaryCheck pronunciation: citric acid oxfordlearnersdictionaries.com