: 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
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Key Ingredients: Squalane, cholesterol esters, vitamin E, vitamin C, retinyl palmitate, Morinda citrifolia extract, and Padina pavonica.
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Kiana Murden, Vogue, 21 Feb. 2025
This is down to the serum’s 0.16% triple-retinoid — a combo of retinol, retinal and retinyl ester — that’s faster-acting and gentle on the skin.
—Venus Wong, refinery29.com, 20 Dec. 2024
Plus, jojoba esters in the formula help to nourish lashes from root to tip.
—Conçetta Ciarlo, Vogue, 14 Feb. 2025
Likewise, Jamaican rums, known for their pot still production and high ester content, have gained popularity among enthusiasts.
—Joseph V Micallef, Forbes, 11 Jan. 2025
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Kiana Murden, Vogue, 21 Feb. 2025
This is down to the serum’s 0.16% triple-retinoid — a combo of retinol, retinal and retinyl ester — that’s faster-acting and gentle on the skin.
—Venus Wong, refinery29.com, 20 Dec. 2024
Plus, jojoba esters in the formula help to nourish lashes from root to tip.
—Conçetta Ciarlo, Vogue, 14 Feb. 2025
Likewise, Jamaican rums, known for their pot still production and high ester content, have gained popularity among enthusiasts.
—Joseph V Micallef, Forbes, 11 Jan. 2025
See All Example Sentences for ester
Cite this Entry
“Ester.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ester. Accessed 12 Mar. 2025.
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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