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) -ine 2