es·​ter | \ˈe-stər \

Definition of ester 

: 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

Lightweight argan and tea seed oils in this formula work to moisturize dry patches and rough bumps, while vitamin C ester fades hyperpigmentation and brightens skin over time with continual use. 2. Chloe Metzger, Marie Claire, "The 5 Truly Brilliant Beauty Products I'm Loving This Week," 26 Sep. 2018 Key aromatics and flavor molecules are being identified such as citrus-like esters from ethyl isobutyrate and pineapple-y aromas derived from ethyl hexanoate or the buttery qualities found in the compound diacetyl. Alan Goldfarb, The Verge, "Artificial whiskey is coming, and one company is betting you’ll drink up," 23 Aug. 2018 Wander Beauty's Wanderlust powder foundation will take your face on an international journey via its wide-reaching ingredient list, which includes Korean aloe leaf and honeysuckle, U.S. jojoba esters, and French hibiscus. Wendy Gould, Allure, "The 9 Best Powder Foundations to Thwart Summer Sweat," 3 July 2018 Now, brewers are playing around with European yeasts, full of fruity esters and other flavor compounds, and leaving them suspended in the beer. William Bostwick, WSJ, "The Beers of Summer: Hazy IPAs," 24 May 2018 Some of the chemicals, known as esters and ketones, are typically used in the flavoring and fragrance industries, while others are used in food processing and incorporated in cleaning products. Don Behm, Milwaukee Journal Sentinel, "Milorganite mystery: Homegrown fertilizer's new scent has officials sleuthing to identify source of change," 30 Apr. 2018 While 98 percent of polyester does come from polyesterification, the two percent extra is a product from the ester squirrel. Kat Eschner, Smithsonian, "How the Nauga and its Fictional Friends Helped Make Synthetic Fabric Cuddly," 12 Sep. 2017 The star ingredients include lactic acid for exfoliation and a retinol (trans-retinol ester) for fading sun damage. Jessica Prince Erlich, The Cut, "14 Natural Beauty Gifts for All Your Favorite Hippies," 19 Dec. 2017 Made with lash-lengthening rice bran wax, thickening vitamin B, and olive esters to condition and protect, lashes are left looking and feeling in prime shape. Kaleigh Fasanella, Allure, "Sephora’s Weekly Wow Sale: What to Buy," 14 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ester.' 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 ester

circa 1852, in the meaning defined above

History and Etymology for ester

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

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Dictionary Entries near ester







ester gum

Statistics for ester

Last Updated

21 Nov 2018

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Time Traveler for ester

The first known use of ester was circa 1852

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More Definitions for ester


es·​ter | \ˈes-tər \

Medical Definition of ester 

: 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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More from Merriam-Webster on ester

Rhyming Dictionary: Words that rhyme with ester

Spanish Central: Translation of ester

Nglish: Translation of ester for Spanish Speakers Encyclopedia article about ester

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to enclose within walls

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