Found 2 items, similar to breechblock.
English → English (WordNet) Definition: breechblock breechblock n : a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing [syn: breech closer]
English → English (gcide) Definition: Breechblock Breechblock \Breech"block\, n. The movable piece which closes the breech of a breech-loading firearm, and resists the backward force of the discharge. It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired. [1913 Webster]