railgun; electromagnetic projectile launcher
Technical term for a weapon that uses electromagnetic force to accelerate a projectile. Often appears in science fiction and military contexts.
In science fiction novels, railguns appear as the main armament of space battleships.
The principle of a railgun is to accelerate a projectile using Lorentz force.
Common loanword for 'railgun', used more broadly in pop culture and gaming. 電磁投射砲 is a more formal, descriptive Japanese term.
Compound of 電磁 (electromagnetic), 投射 (projection, launching), and 砲 (cannon, gun). A modern technical coinage.