谷氨酸 Traditional form: 穀氨酸 Pinyin (reading): gǔ'ānsuān Definitions: glutamic acid (Glu), an amino acid Characters: 谷 - valley, gorge, ravine 氨 - ammonia 酸 - tart, sour; spoiled; acid Traditional characters: 穀 - valley, gorge, ravine 氨 - ammonia 酸 - tart, sour; spoiled; acid