fulminic acid

from WordNet (r) 3.0 (2006)

fulminic acid
    n 1: (CNOH) an unstable acid occurring mainly in the form of
         explosive salts and esters that is isomeric with cyanic
         acid

from The Collaborative International Dictionary of English v.0.48

Fulmiaic \Ful*mia"ic\, a. [Cf. F. fulminique.]
   Pertaining to fulmination; detonating; specifically (Chem.),
   pertaining to, derived from, or denoting, an acid, so called;
   as, fulminic acid.
   [1913 Webster]

   {Fulminic acid} (Chem.), a complex acid, {H2C2N2O2}, isomeric
      with cyanic and cyanuric acids, and not known in the free
      state, but forming a large class of highly explosive
      salts, the fulminates. Of these, mercuric fulminate, the
      most common, is used, mixed with niter, to fill percussion
      caps, charge cartridges, etc. Fulminic acid is made by the
      action of nitric acid on alcohol.
      [1913 Webster]