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A thin metal cap containing an explosive substance, such as fulminate of mercury, that explodes on being struck.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Firearms, Gunnery, Ordnance & Artillery) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a small metallic cap containing an explosive powder, detonated by percussion to fire the charge of small arms.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||percussion cap - a detonator that explodes when struck|
detonating device, detonator, cap - a mechanical or electrical explosive device or a small amount of explosive; can be used to initiate the reaction of a disrupting explosive
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