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trans-fatty acid

or trans fatty acid

[trans-fat-ee] /ˈtrænsˌfæt i/
an unsaturated fatty acid formed by the partial hydrogenation of vegetable oil, believed to raise blood cholesterol levels.
Origin of trans-fatty acid
1975-80; trans- (in the chemistry sense) + fatty acid Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for trans-fatty acid

trans-fatty acid

a polyunsaturated fatty acid that has been converted from the cis-form by hydrogenation: used in the manufacture of margarine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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