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breechblock

[breech-blok] /ˈbritʃˌblɒk/
noun, Ordnance
1.
a movable piece of metal for closing the breech in certain firearms.
Origin of breechblock
1880-1885
1880-85; breech + block
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for breechblock

breechblock

/ˈbriːtʃˌblɒk/
noun
1.
a metal block in breech-loading firearms that is withdrawn to insert the cartridge and replaced to close the breech before firing
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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