elaidic acid

from WordNet (r) 3.0 (2006)

elaidic acid
    n 1: 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

from The Collaborative International Dictionary of English v.0.48

Elaidic \E`la*id"ic\, a. [Cf. F. ['e]la["i]dique. See {Elaine}.]
   Relating to oleic acid, or elaine.
   [1913 Webster]

   {Elaidic acid} (Chem.), a fatty acid isomeric with oleic
      acid, and obtained from it by the action of nitrous acid.
      [1913 Webster]