The Collaborative International Dictionary of English v.0.48:

Glutamic \Glu*tam"ic\, a. [Gluten + -amic.] (Chem.)
   Of or pertaining to gluten.
   [1913 Webster]

   Glutamic acid, a nitrogenous organic acid obtained from
      certain albuminoids, as gluten; -- called also
      amido-glutaric acid.
      [1913 Webster]

WordNet (r) 3.0 (2006):

glutamic acid
    n 1: an amino acid occurring in proteins; important in the
         nitrogen metabolism of plants; used in monosodium glutamate
         to enhance the flavor of meats [syn: glutamic acid,
         glutaminic acid]