backbore

== English == === Etymology === From back +‎ bore. === Noun === backbore (plural backbores) The section between the throat and shank of the mouthpiece of a brass instrument. === Verb === backbore (third-person singular simple present backbores, present participle backboring, simple past and past participle backbored) (firearms, transitive) To modify (a weapon's barrel) so as to increase the bore diameter. ==== Related terms ==== overbore === Anagrams === Baerbock