Noun
detonating cord (plural detonating cords)
An explosive cord, typically used as a fuse/primer to detonate explosive charges, or as a cutting agent to cut patterns explosively. The explosive cord is a small flexible plastic tube filled with explosive in a flexible binder, typically pentaerythritol tetranitrate (“PETN”) (pentrite explosives).
For instance, TNT has a detonation (burn) rate of approximately 5.8 km/s (19,000 feet per second), Detonating cord of 6.7 km/s (22,000 feet per second), and C-4 about 8.5 km/s (29,000 feet per second). Source: Internet