A mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive WordNet 3.0 & Open English WordNet

A detonator, sometimes called a blasting cap in the US, is a small sensitive device used to provoke a larger, more powerful but relatively insensitive secondary explosive of an explosive device used in commercial mining, excavation, demolition, etc. Wikipedia

Device used to trigger an explosive device. Wikipedia Disambiguation

an device used to trigger explosives Wikidata

A device, as a percussion cap, used to make another substance explode. OmegaWiki

A small explosive device used to detonate a larger charge of explosives. Wiktionary

A device used to detonate an explosive device etc. Wiktionary

Device used to detonate an explosive device. Wiktionary (translation)