trans-fatty acid

or trans fat·ty ac·id

[trans-fat-ee]
  1. 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for trans-fatty acid

trans-fatty acid

trans fat

noun
  1. 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