Bible Dictionaries
Breechblock

Webster's Dictionary

(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 It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired.

Bibliography Information
Webster, Noah. Entry for 'Breechblock'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​b/breechblock.html. 1828.