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• POLYUNSATURATED FATTY ACID (noun) The noun POLYUNSATURATED FATTY ACID has 1 sense: 1. an unsaturated fatty acid whose carbon chain has more than one double or triple valence bond per molecule; found chiefly in fish and corn and soybean oil and safflower oil Familiarity information: POLYUNSATURATED FATTY ACID used as a noun is very rare.
