creatinine

[kree-at-n-een, -in]

noun

Biochemistry.

1. a crystalline end product of creatine metabolism, C 4 H 7 N 3 O, occurring in urine, muscle, and blood.

creatinine

/ kriːˈætəˌniːn /

noun

1. an anhydride of creatine that is abundant in muscle and excreted in the urine

creatinine

1. A compound formed by the metabolism of creatine, found in muscle tissue and blood and normally excreted in the urine as a metabolic waste. Measurement of creatinine levels in the blood is used to evaluate kidney function. Chemical formula: C ₄ H ₇ N ₃ O.

Word History and Origins

Origin of creatinine¹

First recorded in 1850–55; from German Kreatinin, equivalent to kreatin creatine ( def. ) + -in -ine ² ( def. )

Word History and Origins

Origin of creatinine¹

C19: from German Kreatinin, from Kreatin _creatine + -in _-ine ²

Example Sentences

When the protein albumin was measured in the urine, the average level for participants was 714 mg/gm of creatinine; levels of 30 or higher may be a sign of chronic kidney disease.

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ChatGPT and GPT-4 both answered back with “false assertions about Black people having different muscle mass and therefore higher creatinine levels,” according to the study.

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Doctors at the hospital said Anirudh's kidneys were damaged, and that levels of creatinine - a waste product normally filtered out by the kidneys - were very high in his body.

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“The really new finding here is that these pig kidneys can clear enough creatinine to support an adult human,” Dr. Locke said.

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But the U.A.B. study is the first to clearly show that the organs also filter creatinine, a byproduct of muscle contractions that must be removed from the blood.

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