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percussion cap

noun

  1. a small metallic cap or cup containing fulminating powder, formerly exploded by percussion to fire the charge of small arms.


percussion cap

noun

  1. a detonator consisting of a paper or thin metal cap containing material that explodes when struck and formerly used in certain firearms
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of percussion cap1

First recorded in 1815–25

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percussionpercussion flaking