ke·​to | \ ˈkē-(ˌ)tō How to pronounce keto (audio) \

Definition of keto

: of or relating to a ketone also : containing a ketone group

Examples of keto in a Sentence

Recent Examples on the Web

Those compounds are what cause keto breath: a metallic-tasting, somewhat stinky side effect. Jaclyn London, Ms, Rd, Cdn, Good Housekeeping, "9 Keto Diet Dangers Nutritionists Want You to Know About," 2 Jan. 2019

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

First Known Use of keto

1891, in the meaning defined above

History and Etymology for keto


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The first known use of keto was in 1891

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ke·​to | \ ˈkēt-(ˌ)ō How to pronounce keto (audio) \

Medical Definition of keto

: of or relating to a ketone also : containing a ketone group

More from Merriam-Webster on keto

Rhyming Dictionary: Words that rhyme with keto

Comments on keto

What made you want to look up keto? Please tell us where you read or heard it (including the quote, if possible).


to affect and impair by alcohol or a drug

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