Système de mise ŕ feu d'une charge explosive.
Or blasting cap or percussion cap; Small explosive charge used to trigger off a main charge of high explosive. The relatively unstable compounds mercury fulminate and lead acid are often used in detonators, being set off by a lighted fuse or, more commonly, an electric current.
A mechanical or electrical device or a small amount of explosive; can be used to fire an explosive charge; SYN. detonating device, cap.