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English definition of “Omega-3”

Omega-3

noun [U]     /ˌəʊ.mɪ.ɡəˈθriː/ US  /ˌoʊ-/
a substance in the oil from some fish such as tuna and salmon and in some seeds, thought to be good for your healthFish and seafoodSea fishFreshwater fishVitamins and minerals
(Definition of Omega-3 noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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