'Detonator' definitions:

Definition of 'detonator'

(from WordNet)
noun
A mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive [syn: detonator, detonating device, cap]

Definition of 'Detonator'

From: GCIDE
  • Detonator \Det"o*na`tor\ (d[e^]t"[-o]*n[=a]`t[~e]r), n. One that detonates; specif.: (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. [Obs.] [Webster 1913 Suppl.]