percussion cap


noun

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

Origin of percussion cap

First recorded in 1815–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for percussion cap

percussion cap


noun

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