fish oil

noun

: a fatty oil from the bodies of various fishes (such as menhaden or sardines) that contains large amounts of unsaturated fatty acids and is used as a dietary supplement and in making various products (such as cosmetics and paints)

Examples of fish oil in a Sentence

Recent Examples on the Web
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Studies on fish oil supplements and blood pressure, however, are mixed. Julia Ries Wexler, Health, 12 May 2026 Foods or dietary supplements rich in unsaturated fats (such as fish and fish oils) are more prone to rancidity. Ayesha Gulzar, Verywell Health, 6 May 2026 Additionally, fish oil use was linked to a buildup of a protein called tau, which is often associated with long-term brain diseases. Khloe Quill, FOXNews.com, 29 Apr. 2026 The health benefits of taking fish oil Omega-3s are essential fatty acids the body needs but cannot produce. Bestreviews, Chicago Tribune, 27 Apr. 2026 See All Example Sentences for fish oil

Word History

First Known Use

1654, in the meaning defined above

Time Traveler
The first known use of fish oil was in 1654

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Cite this Entry

“Fish oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fish%20oil. Accessed 20 May. 2026.

Medical Definition

fish oil

noun
: a fatty oil that is obtained from oily fish (such as herring or menhaden), contains large amounts of unsaturated fatty acids, and is used as a dietary supplement and in making various products (such as protective coatings, cosmetics, and animal feed)
Scientists learned some time ago that there are significant health benefits from consuming omega-3 fatty acids, which are found mostly in fish oils, algal oils, and linseed oil.Felicia M. Willis, Today's Chemist at Work

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