the anhydride of creatine, CHNO, found in blood, muscle, and esp. urine, where measurement of its excretion is used to evaluate kidney function
Origin of creatinineGerman kreatinin ; from kreatin (see creatine) + -ine
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.
Origin of creatininecreatin(e) + –ine2.