精氨酸 Traditional form: 精氨酸 Pinyin (reading): jīng'ānsuān Definitions: argnine (Arg), an essential amino acid Characters: 精 - essence, germ, spirit 氨 - ammonia 酸 - tart, sour; spoiled; acid Traditional characters: 精 - essence, germ, spirit 氨 - ammonia 酸 - tart, sour; spoiled; acid