triggering explosive; initiating explosive; primary explosive
Technical term for an explosive used to detonate a larger charge; common in military, demolition, and pyrotechnic contexts.
Triggering explosives are used in detonators.
This initiating explosive is sensitive to impact.
Compound of 起爆 (きばく, 'detonation') and 薬 (やく, 'chemical agent, drug'). The exact historical derivation is uncertain, but the term follows standard Sino-Japanese word formation patterns for technical vocabulary.