Fumaric acid

from WordNet (r) 3.0 (2006)

fumaric acid
    n 1: a colorless crystalline acid with a fruity taste; used in
         making polyester resins

from The Collaborative International Dictionary of English v.0.48

Fumaric \Fu*mar"ic\, a. (Chem.)
   Pertaining to, or derived from, fumitory ({Fumaria
   officinalis}).
   [1913 Webster]

   {Fumaric acid} (Chem.), a widely occurring organic acid,
      extracted from fumitory as a white crystallline substance,
      {C2H2(CO2H)2}, and produced artificially in many ways, as
      by the distillation of malic acid; boletic acid. It is
      found also in the lichen, Iceland moss, and hence was also
      called {lichenic acid}.
      [1913 Webster]