脂肪酸 Traditional form: 脂肪酸 Pinyin (reading): zhīfángsuān Definitions: fatty acid Characters: 脂 - fat, grease, lard, oil 肪 - animal fat 酸 - tart, sour; spoiled; acid Traditional characters: 脂 - fat, grease, lard, oil 肪 - animal fat 酸 - tart, sour; spoiled; acid