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 ]
(n) a fulminate that when dry explodes violently if struck or heated; used in detonators and blasting caps and percussion caps, Syn. fulminating mercury, fulminate of mercury