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

This shift is terrific for our tickers—fish and seafood are rich in heart-healthy omega-3 fats—and for our taste buds. —Karla Walsh, Better Homes & Gardens, 21 Sep. 2024

To that end, the doctor recommends eating foods that are rich in iron, omega-3 fatty acids, zinc, biotin, selenium and vitamin B5 for healthy hair growth. —Philipp Wehsack, Vogue, 20 Sep. 2024

Researchers believe that omega-3 fatty acids in fish oil act as anti-inflammatories and may be an alternative to other immunosuppressants such as corticosteroids, but without the unwanted side effects. —Cristina Mutchler, Health, 20 Sep. 2024

Yet, fish are unique because many are also a good source of omega-3 fatty acids and other healthy fats. —Brittany Lubeck, Ms, Rdn, Verywell Health, 19 Sep. 2024

Word History

First Known Use

1967, in the meaning defined above

Medical 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

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