ke·​tone | \ ˈkē-ˌtōn How to pronounce ketone (audio) \

Definition of ketone

: any of a class of organic compounds (such as acetone) characterized by a carbonyl group attached to two carbon atoms

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Other Words from ketone

ketonic \ kē-​ˈtä-​nik How to pronounce ketonic (audio) \ adjective

Examples of ketone in a Sentence

Recent Examples on the Web

Metabolic switching between glucose and ketones is when cognition is best and degenerative diseases are kept at bay. Rahul Jandial, Md,, "The Popular Diet One Neurosurgeon Swears By as a Way to Boost His Brainpower," 5 June 2019 For an alternative source of energy, your liver will start to convert fat into ketones, which will then be released into the bloodstream and be used by your cells for energy. Karla Walsh, Woman's Day, "The Ultimate Keto Diet Foods List of What You Can (and Can't) Eat," 28 Dec. 2018 This time, the doctor found something called ketones in my urine, which meant my body was breaking down more of itself for energy than is safe. Jenn Morson, Redbook, "A Rare Condition While I Was Pregnant Nearly Killed Me and My Baby," 5 Sep. 2017 Pricey keto supplements include ingredients like ketones designed to suppress appetite, electrolytes for the dehydrating effects of the diet, certain vitamins and minerals, and even caffeine. Jaclyn London, Ms, Rd, Cdn, Good Housekeeping, "Keto Diet Pills and Supplements May Hurt Your Health and Waste Your Money," 16 Jan. 2019 Here in the 21st century: Taking supplemental ketones to help enhance this biological process will likely decrease appetite by raising blood levels of ketone bodies. Jaclyn London, Ms, Rd, Cdn, Good Housekeeping, "Keto Diet Pills and Supplements May Hurt Your Health and Waste Your Money," 16 Jan. 2019 Your doctor will also probably give you a urine test to look for ketones (byproducts from the breakdown of fat), which can help differentiate between type 1 and type 2 diabetes. Korin Miller, SELF, "The Diabetes Symptom That Finally Helped Nick Jonas Get a Diagnosis," 19 Nov. 2018 The switch generates the production of ketones, which are energy molecules that are made in the liver. Mark Barna, Discover Magazine, "Not So Fast," 24 Sep. 2018 Excess ketones cause the blood itself to become acidic. Carrie Dennett, The Seattle Times, "It’s a dangerous eating disorder that affects people with diabetes. So why haven’t you heard of it?," 20 Aug. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ketone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ketone

1851, in the meaning defined above

History and Etymology for ketone

German Keton, alteration of Aceton acetone

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Statistics for ketone

Last Updated

9 Jun 2019

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Time Traveler for ketone

The first known use of ketone was in 1851

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More Definitions for ketone


ke·​tone | \ ˈkē-ˌtōn How to pronounce ketone (audio) \

Medical Definition of ketone

: an organic compound (as acetone) with a carbonyl group attached to two carbon atoms

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