creatinine
noun
cre·at·i·nine
krē-ˈa-tə-ˌnēn 
-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
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In drug testing, urine creatinine levels are used to help detect urine sample dilution.
—
Jillian Kubala, Health, 26 Aug. 2025
Other follow up tests include checking for protein in the urine or urine protein:creatinine ratio.
—Dr. John De Jong, Boston Herald, 10 Aug. 2025
Most people get high creatinine from their diet by eating red meat, lean meats, and seafood.
—Lana Barhum, Verywell Health, 21 Apr. 2025
Renal function is measured with a creatinine lab test.
—John Bacon, USA TODAY, 26 Feb. 2025
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Jillian Kubala, Health, 26 Aug. 2025
Other follow up tests include checking for protein in the urine or urine protein:creatinine ratio.
—Dr. John De Jong, Boston Herald, 10 Aug. 2025
Most people get high creatinine from their diet by eating red meat, lean meats, and seafood.
—Lana Barhum, Verywell Health, 21 Apr. 2025
Renal function is measured with a creatinine lab test.
—John Bacon, USA TODAY, 26 Feb. 2025
See All Example Sentences for creatinine
Cite this Entry
“Creatinine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/creatinine. Accessed 10 Sep. 2025.
Copy CitationMedical Definition
creatinine
noun
cre·at·i·nine
krē-ˈat-ᵊn-ˌēn, -ᵊn-ən
: a white crystalline strongly basic compound C4H7N3O formed from creatine and found especially in muscle, blood, and urine
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