Definition of screw-barrel in English:

screw-barrel

adjective

  • 1Designating a pistol or other firearm whose barrel is unscrewed and removed in order to load the projectile into the exposed breech. Now chiefly historical.

  • 2Designating a microscope with a threaded barrel which can be turned in order to adjust the focus. Now historical.

noun

  • 1A screw barrel gun.

  • 2Any of various types of threaded or grooved cylinder forming part of a mechanical device.

Origin

Late 17th century. From screw + barrel.