A bottle containing 1.5 liters of fluid, double the volume of a standard wine bottle.
A powerful firearm cartridge, often derived from a shorter, less powerful cartridge calibre that uses the same bullet.
A handgun that fires a cartridge of this calibre; chiefly a revolver, but rarely an autoloader firing an unusually powerful calibre.
A tap or faucet that regulates the flow of a fluid.
A person employed to turn on the water for the mains, to regulate the fireplugs, etc. for a water company.