クレアチニンクレアチニンMeanings1nouncreatininebiochemistryBiochemical term for a waste product from muscle metabolism, commonly measured in blood and urine tests.血けつ液えき検けん査さでクレアチニンの値あたいが高たかいと言いわれた。I was told my creatinine level was high in the blood test.