WordReference Random House Unabridged Dictionary of American English © 2026
percus′sion cap′, 
  1. Militarya small metallic cap or cup containing fulminating powder, formerly exploded by percussion to fire the charge of small arms.
  • 1815–25

Collins Concise English Dictionary © HarperCollins Publishers::
percussion cap n
  1. a detonator consisting of a paper or thin metal cap containing material that explodes when struck and formerly used in certain firearms
'percussion cap' also found in these entries (note: many are not synonyms or translations):
cap - detonator - hammer - percussion - torpedo - percussion lock - safety fuze

Forum discussions with the word(s) "percussion cap" in the title:


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