The Columbia Encyclopedia, Sixth Edition. 2001-07.
detonator
(d´tn´´tr) (KEY) , type of explosive that reacts with great rapidity and is used to set off other, more inert explosives. Fulminate of mercury mixed with potassium chlorate is a commonly used detonator. The word is also applied to equipment which, by flame, spark, percussion, friction, or pressure, is used to set off a chemical detonator.