ester

noun

es·​ter ˈe-stər How to pronounce ester (audio)
: any of a class of often fragrant organic compounds that can be represented by the formula RCOOR′ and that are usually formed by the reaction between an acid and an alcohol with elimination of water

Examples of ester 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.
Infused with pearl pigments, glossy ester, and mica, the hues give off a diamond-like shine. Jenny Berg, Vogue, 21 Dec. 2024 This seasonal beer is golden in color with a big floral aroma, mild ginger spice flavor, and Belgian yeast esters of fruit and bubblegum. Kathryn Gregory, The Courier-Journal, 9 Dec. 2024 Cannabis offers a broad spectrum of unique flavors and aromas, all derived from terpenes, esters, and other flavorants. Chelsea Davis, Forbes, 18 Dec. 2024 New approaches replace the mineral oil with natural esters to allow the interior of the transformer to safely reach higher temperatures, prolonging the device’s lifespan in the process. IEEE Spectrum, 11 Dec. 2024 See all Example Sentences for ester 

Word History

Etymology

German, from Essigäther ethyl acetate, from Essig vinegar + Äther ether

First Known Use

circa 1852, in the meaning defined above

Time Traveler
The first known use of ester was circa 1852

Dictionary Entries Near ester

Cite this Entry

“Ester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ester. Accessed 18 Jan. 2025.

Kids Definition

ester

noun
es·​ter ˈes-tər How to pronounce ester (audio)
: an organic compound formed by the reaction between an acid and an alcohol

Medical Definition

ester

noun
es·​ter ˈes-tər How to pronounce ester (audio)
: any of a class of often fragrant compounds that can be represented by the formula RCOOR′ and that are usually formed by the reaction between an acid and an alcohol usually with elimination of water

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