: 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
What’s more, jojoba esters keep the hair smooth in the face of humidity, while phytantriol both prevents color from washing out and serves as a heat protectant.
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Jenny Berg, Vogue, 11 Sep. 2024
In animal foods, vitamin A is found in the form of retinol and retinyl esters.
—Jillian Kubala, Health, 16 Sep. 2024
Meanwhile, retinyl ester is the least potent (and most stable) form of vitamin A out of the three.
—Venus Wong, refinery29.com, 5 Sep. 2024
Regardless if your current color is natural, salon-made, or DIY, Living Proof's intensive formulation of conditioning ingredients like jojoba esters, glycerin, triglycerides, and sodium hyaluronate plump and smooth each strand, leaving a shinier finish behind in the process.
—Deanna Pai, Allure, 8 Aug. 2024
See all Example Sentences for ester 
Jenny Berg, Vogue, 11 Sep. 2024
In animal foods, vitamin A is found in the form of retinol and retinyl esters.
—Jillian Kubala, Health, 16 Sep. 2024
Meanwhile, retinyl ester is the least potent (and most stable) form of vitamin A out of the three.
—Venus Wong, refinery29.com, 5 Sep. 2024
Regardless if your current color is natural, salon-made, or DIY, Living Proof's intensive formulation of conditioning ingredients like jojoba esters, glycerin, triglycerides, and sodium hyaluronate plump and smooth each strand, leaving a shinier finish behind in the process.
—Deanna Pai, Allure, 8 Aug. 2024
See all Example Sentences for ester
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ester.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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“Ester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ester. Accessed 1 Oct. 2024.
Copy CitationKids Definition
ester
noun
es·ter
ˈes-tər 
: an organic compound formed by the reaction between an acid and an alcohol
Medical Definition
ester
noun
es·ter
ˈes-tər
: 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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