Source : Webster's Revised Unabridged Dictionary (1913)

Fulminating \Ful"mi*na"ting\, a.
   1. Thundering; exploding in a peculiarly sudden or violent
      manner.

   2. Hurling denunciations, menaces, or censures.

   {Fulminating oil}, nitroglycerin.

   {Fulminating powder} (Chem.) any violently explosive powder,
      but especially one of the fulminates, as mercuric
      fulminate.