creatinine

American  

[kree-at-n-een, -in] / kriˈæt nˌin, -ɪn /

noun

Biochemistry.

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

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creatinine British  

/ kriːˈætəˌniːn /

noun

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

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creatinine Scientific  

/ krē-ăt′n-ēn′,-ĭn /

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.

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Etymology

Origin of creatinine

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

Compare meaning

How does creatinine compare to similar and commonly confused words? Explore the most common comparisons:

• creatine vs. creatinine

Example Sentences

For many years, doctors have relied on a blood marker called creatinine to estimate how well the kidneys filter waste produced by muscle activity.

From Science Daily

Researchers from NYU Langone Health found that large differences between creatinine and cystatin C results are common, particularly among people who are already ill.

From Science Daily

In a large international analysis, more than one third of hospitalized patients had cystatin C results that suggested kidney function was at least 30% worse than what their creatinine levels indicated.

From Science Daily

"Our findings highlight the importance of measuring both creatinine and cystatin C to gain a true understanding of how well the kidneys are working, particularly among older and sicker adults," said study co-corresponding author Morgan Grams, MD, PhD.

From Science Daily

All participants had both creatinine and cystatin C measured on the same day and were followed for an average of 11 years.

From Science Daily