: a monounsaturated fatty acid C18H34O2 obtained from natural fats and oils

Examples of oleic acid in a Sentence

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For example, oleic acid from cooking, squalene from human skin and bisphenol A from hard plastics can remain on surfaces for years if undisturbed. Katelyn Richard, The Conversation, 9 Jan. 2026 Of these MUFAs, about 80% is oleic acid, which regulates antioxidant activity and promotes immune function. Lauren O'Connor, Health, 31 Dec. 2025 Studies in animal models have also shown that oleic acid, a fatty acid found in olive oil, can enhance the function of the intestinal barrier by increasing the levels of beneficial bacteria in the gut, specifically Bifidobacteria. Angelica Bottaro, Verywell Health, 22 Oct. 2025 Medical researchers from the University of Hong Kong (HKUMed) have found that oleic acid (OA) – the kind found in olive oil – boosts γδ-T cells (or delta gamma T cells). New Atlas, 9 Oct. 2025 See All Example Sentences for oleic acid

Word History

First Known Use

1819, in the meaning defined above

Time Traveler
The first known use of oleic acid was in 1819

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Cite this Entry

“Oleic acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/oleic%20acid. Accessed 15 Jan. 2026.

Medical Definition

oleic acid

noun
: a monounsaturated fatty acid C18H34O2 found in natural fats and oils

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