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English definition of “trans fat”

trans fat

noun [C or U] uk   /ˈtrænz.fæt/ ( also trans-fatty acid) us  
a type of fat that is produced by hydrogenation (= when vegetable oil is made into solid fat) and is used in margarine, fried foods, etc.: An excess of trans fats in the diet can cause high cholesterol levels.
(Definition of trans fat from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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