Elaidic \E`la*id"ic\, a. [Cf. F. ['e]la["i]dique. See {Elaine}.] Relating to oleic acid, or elaine. {Elaidic acid} (Chem.), a fatty acid isomeric with oleic acid, and obtained from it by the action of nitrous acid.
elaidic acid n : a monounsaturated fatty acid that has the same structure as oleic acid except that it is a trans fatty acid; the major trans fatty acid in margarine and fried foods