Creatinine:a creatine anhydride, C4H7N3O, formed by the metabolism of creatine, that is found in muscle tissue and blood and normally excreted in the urine as a metabolic waste.

• 肌酸酐：一种肌酸酐，c4h7n3o，由肌酸的新陈代谢形成，发现于肌肉细胞组织和血液中，一般作为新陈代谢的废物通过尿液排出。