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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How to Safely Take Fish Oil Supplements There are different fish oil supplements available in the market. Ayesha Gulzar, Verywell Health, 2 Apr. 2026 Some data suggest that multivitamins, vitamin D, and omega-3 or fish oil supplements can help fill nutrient gaps while taking GLP-1s, and that protein and creatine supplementation may help preserve lean mass and build muscle strength during weight loss. Lauren Manaker, SELF, 10 Mar. 2026 Designed for children 2 and 3 years old, these vitamins have 15 essential nutrients, including vitamin D3, omega-3 fish oil, vitamin E and iodine. Pubsubhub User, Chicago Tribune, 6 Feb. 2026 Higher concentrations of omega-3 fish oil can also be prescribed by your healthcare provider.2 Some studies have found that getting omega-3 fatty acids from your diet has a more significant effect than taking a supplement. Kirstyn Hill, Health, 2 Feb. 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 6 Apr. 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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