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firing pin

firing pin

5 6.8
A small metal part inside a gun that hits the cartridge to start the bullet moving
  • noun
  • /ˈfaɪərɪŋ pɪn/
  • Specialized
translation icon : percutor
  • We took the precaution of removing the firing pin before the mission started.
  • firing pin mechanism
  • firing pin hit the primer
  • firing pin on your gun

Examples

Surface Forms

firing pin singular
firing pins plural

Morphology

firing + pin

The meaning is directly derivable from the constituents: 'firing' (relating to discharge/ignition) modifies 'pin' (a small slender metal piece), so a learner who knows both words can infer it is a small pin used in the firing mechanism of a firearm. This noun–noun compounding pattern (function/relator + object) is common cross-linguistically, making the term compositional though somewhat more technical.

Etymology

Firing pin is the name for the small metal pin inside a gun that hits the bullet to make it 'fire'. So the name shows it is the small part that starts the shot.