色胺酸 Traditional form: 色胺酸 Pinyin (reading): sè'ànsuān Definitions: tryptophan Characters: 色 - color, tint, hue, shade; beauty, form; sex 胺 - amine 酸 - tart, sour; spoiled; acid Traditional characters: 色 - color, tint, hue, shade; beauty, form; sex 胺 - amine 酸 - tart, sour; spoiled; acid