noun
tartaric acid
A dicarboxylic acid found in many plants, particularly grapes; used in food, wine, and as a chemical reagent.
酒石酸はワインの酸味の主成分です。
Tartaric acid is the main component of the sour taste in wine.
Compound of 酒石 (tartar, literally 'wine stone') + 酸 (acid). The term 酒石 refers to the potassium bitartrate crystals that form in wine casks.