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Definition of percussion cap - 2 dictionary results

percussion cap

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

Origin:
1815–25
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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percussion cap  
n.  A thin metal cap containing an explosive substance, such as fulminate of mercury, that explodes on being struck.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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