鸟胺酸 Traditional form: 鳥胺酸 Pinyin (reading): niǎo'ànsuān Definitions: ornithine Characters: 鸟 - bird 胺 - amine 酸 - tart, sour; spoiled; acid Traditional characters: 鳥 - bird 胺 - amine 酸 - tart, sour; spoiled; acid