burster

from WordNet (r) 3.0 (2006)

burster
    n 1: a quantity of explosive to be set off at one time; "this
         cartridge has a powder charge of 50 grains" [syn: {charge},
         {burster}, {bursting charge}, {explosive charge}]

from The Collaborative International Dictionary of English v.0.48

Burster \Burst"er\ (b[^u]rst"[~e]r), n.
   One that bursts.
   [1913 Webster]