creatinine

noun

cre·​at·​i·​nine krē-ˈa-tə-ˌnēn How to pronounce creatinine (audio)
-ən
: a white crystalline strongly basic compound C4H7N3O formed from creatine and found especially in muscle, blood, and urine

Examples of creatinine in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
As a supplement, creatinine is often used to increase athletic performance. New Atlas, 20 Mar. 2025 The body degrades creatine, turning it into creatinine. Melissa Nieves, Verywell Health, 13 Mar. 2025 Healthy kidneys filter creatinine and other waste products out of the blood and into urine. John Bacon, USA TODAY, 26 Feb. 2025 But metabolites—like lactate, creatinine, and glucose—shouldn’t be too much harder. IEEE Spectrum, 22 Oct. 2014 See All Example Sentences for creatinine

Word History

Etymology

German Kreatinin, from Kreatin creatine

First Known Use

1851, in the meaning defined above

Time Traveler
The first known use of creatinine was in 1851

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Cite this Entry

“Creatinine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/creatinine. Accessed 20 Apr. 2025.

Medical Definition

creatinine

noun
cre·​at·​i·​nine krē-ˈat-ᵊn-ˌēn, -ᵊn-ən How to pronounce creatinine (audio)
: a white crystalline strongly basic compound C4H7N3O formed from creatine and found especially in muscle, blood, and urine

More from Merriam-Webster on creatinine

Last Updated: - Updated example sentences
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