a. 1. Thundering; exploding in a peculiarly sudden or violent manner. [ 1913 Webster ] 2. Hurling denunciations, menaces, or censures. [ 1913 Webster ] Fulminating oil, nitroglycerin. -- Fulminating powder (Chem.) any violently explosive powder, but especially one of the fulminates, as mercuric fulminate. [ 1913 Webster ]
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