A reddish acid compound, chiefly potassium bitartrate, found in the juice of grapes and deposited on the sides of casks during winemaking.

• 酒石酸氢钾一种在葡萄汁中找到的并在酿酒过程中沉淀于桶壁的浅红色酸性化合物，主要指酒石酸氢钾