: any of a class of organic compounds (such as acetone) characterized by a carbonyl group attached to two carbon atoms
Examples of ketone in a Sentence
Recent Examples on the Web
If their blood sugar is over 240 mg/dL and ketone levels are high, go to the ER.10
Hyperglycemia (high blood sugar) is an early warning sign of diabetes.
—
Barbie Cervoni, Verywell Health, 15 July 2025
These fats are metabolized by the body into ketones which are said to increase satiety and provide rapid energy to the brain.
—Alessandra Signorelli, Vogue, 30 Apr. 2025
During ketosis, the body breaks down fat into ketones and uses them for fuel.
—Chelsea Rae Bourgeois, Rdn, Health, 24 Apr. 2025
The researchers noted no increase in dangerous complications such as diabetic ketoacidosis (DKA), a life-threatening complication of diabetes that occurs when there’s a lack of insulin and the body has to burn fat for energy instead of glucose, leading to a buildup of ketones in the blood.
—New Atlas, 25 June 2025
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Barbie Cervoni, Verywell Health, 15 July 2025
These fats are metabolized by the body into ketones which are said to increase satiety and provide rapid energy to the brain.
—Alessandra Signorelli, Vogue, 30 Apr. 2025
During ketosis, the body breaks down fat into ketones and uses them for fuel.
—Chelsea Rae Bourgeois, Rdn, Health, 24 Apr. 2025
The researchers noted no increase in dangerous complications such as diabetic ketoacidosis (DKA), a life-threatening complication of diabetes that occurs when there’s a lack of insulin and the body has to burn fat for energy instead of glucose, leading to a buildup of ketones in the blood.
—New Atlas, 25 June 2025
See All Example Sentences for ketone
Cite this Entry
“Ketone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ketone. Accessed 30 Jul. 2025.
Copy CitationMedical Definition
ketone
noun
ke·tone
ˈkē-ˌtōn 
: an organic compound (as acetone) with a carbonyl group attached to two carbon atoms
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