omega-3
adjective
ome·ga-3
ō-ˈmā-gə-ˈthrē 
-ˈmē-,
-ˈme-
: being or composed of polyunsaturated fatty acids that have the final double bond in the hydrocarbon chain between the third and fourth carbon atoms from the end of the molecule opposite that of the carboxyl group and that are found especially in fish, fish oils, green leafy vegetables, and some nuts and vegetable oils compare omega-6
omega-3
noun
Examples of omega-3 in a Sentence
Recent Examples on the Web
In addition to being available in a variety of supplements, dietary options to improve omega-3s intake include fatty fish, walnuts, flaxseeds and chia seeds.
—
Daryl Austin, USA Today, 7 June 2025
But if sardines aren't your thing, there are plenty of foods besides fish or seafood that help boost your omega-3 intake.
—Sohaib Imtiaz, Verywell Health, 6 June 2025
These shelf-stable picks are often loaded with high-quality protein, omega-3 fatty acids, and essential vitamins and minerals that offer a range of health benefits.
—Lindsey Desoto, Health, 5 June 2025
Other fatty fishes, like sardines with bones and mackerel, offer the same vitamin D and omega-3 benefits, Wright told Fox News Digital.
—Angelica Stabile, FOXNews.com, 4 June 2025
See All Example Sentences for omega-3
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Daryl Austin, USA Today, 7 June 2025
But if sardines aren't your thing, there are plenty of foods besides fish or seafood that help boost your omega-3 intake.
—Sohaib Imtiaz, Verywell Health, 6 June 2025
These shelf-stable picks are often loaded with high-quality protein, omega-3 fatty acids, and essential vitamins and minerals that offer a range of health benefits.
—Lindsey Desoto, Health, 5 June 2025
Other fatty fishes, like sardines with bones and mackerel, offer the same vitamin D and omega-3 benefits, Wright told Fox News Digital.
—Angelica Stabile, FOXNews.com, 4 June 2025
See All Example Sentences for omega-3
Cite this Entry
“Omega-3.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/omega-3. Accessed 12 Jun. 2025.
Copy CitationMedical Definition
omega-3
adjective
ome·ga-3
-ˈthrē
variants
also Omega-3
: being or composed of polyunsaturated fats that have the first double bond in the hydrocarbon chain occurring between the third and fourth carbon atoms from the end of the molecule most distant from the carboxylic acid group and that are found especially in fish, fish oils, green leafy vegetables, and some nuts and seeds
The two main omega-3 fatty acids in fish oil … appear to reduce the risk of dying from sudden cardiac arrest by about 30 percent.—Nutrition Action Health Letter
compare omega-6
Nutrition Action Health Letter
omega-3
noun
also Omega-3
Some plants, such as linseed, naturally produce an omega-3 called alpha-linolenic acid (ALA), and one way to increase the amount of omega-3 in our diet is to eat these plants …
—Andy Coghlan, New Scientist
Andy Coghlan, New Scientist
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