backbore

backbore

English

Etymology

From back +‎ bore.

Noun

backbore (plural backbores)

  1. The section between the throat and shank of the mouthpiece of a brass instrument.
    More conical backbores give a richer tone, while more cylindrical ones give a brighter, more projected tone.

Verb

backbore (third-person singular simple present backbores, present participle backboring, simple past and past participle backbored)

  1. (firearms, transitive) To modify (a weapon's barrel) so as to increase the bore diameter.
    Hypernyms: bore < cut
  2. (machining) To bore from the backside of a workpiece by using a boring tool that passes through one or more through holes, deploys a cutting edge (or receives it by manual insertion from an operator), bores a feature on the far side, retracts the cutting edge (or has it removed), and then retreats back through the hole (toward the tool's origin).
    Hypernyms: bore < cut
    Coordinate terms: counterbore, back-counterbore; countersink, back-countersink; spotface, back-spotface

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