羧基酸 Traditional form: 羧基酸 Pinyin (reading): suōjīsuān Definitions: carboxylic acid Characters: 羧 - carboxyl group 基 - foundation, base 酸 - tart, sour; spoiled; acid Traditional characters: 羧 - carboxyl group 基 - foundation, base 酸 - tart, sour; spoiled; acid