“Troy grimly thumbed the detonator as a trio of eager gunrunners raced forward with what looked like shaped charges of plastique.”
“At his instance the police also recovered a detonator and a piece of fuse wire from his house.”
“As the camera zooms it, the object is revealed to be a detonator for an explosive device.”
detonation
An explosion or sudden report made by the near-instantaneous decomposition or combustion of unstable substances. Specifically, combustion that spreads supersonically via shockcompression.