Origin: Latin prefix trans-
Trans fatty acid has 2 different meanings across 1 category:
a fatty acid that has been produced by hydrogenating an unsaturated fatty acid (and so changing its shape); found in processed foods such as margarine and fried foods and puddings and commercially baked goods and partially hydrogenated vegetable oils
An unsaturated fatty acid in which one or more of the double bonds has the trans orientation instead of the usual cis orientation.