Detonator
Detonator (det"o*nā`tẽr) , noun
One that detonates
(a)
An explosive whose action is practically instantaneous.
(b)
Something used to detonate a charge, as a detonating fuse.
(c)
A case containing detonating powder, the explosion of which serves as a signal, as on railroads.
(d)
A gun fired by a percussion cap. [Obsolete]