fulminate of mercury(n = noun.substance) fulminating mercury, mercury fulminate - a fulminate that when dry explodes violently if struck or heated; used in detonators and blasting caps and percussion caps;
is a kind of fulminate
is a part of blasting cap, percussion cap

   The mercury salt of fulminic acid (Hg(CNO)2), called also mercury fulminate. It is prepared as gray crystals, and is used primarily in detonators for detonating high explosives, such as dynamite or TNT. [PJC]

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