The Collaborative International Dictionary of English v.0.48:

Gluconic \Glu*con"ic\, a.
   Pertaining to, or derived from, glucose.
   [1913 Webster]

   Gluconic acid (Chem.), an organic acid, obtained as a
      colorless, sirupy liquid, by the oxidation of glucose; --
      called also maltonic acid, and dextronic acid.
      [1913 Webster]