Bible Dictionaries
Breech Screw

Webster's Dictionary

A strong iron or steel plug screwed into the breech of a musket or other firearm, to close the bottom of the bore.

Bibliography Information
Webster, Noah. Entry for 'Breech Screw'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​b/breech-screw.html. 1828.