noun
A weapon that uses electromagnetic force to accelerate a conductive projectile along a pair of rails. Technical term, often appears in sci-fi and military contexts.
See also: 電磁砲
SF映画でレールガンが登場した。
A railgun appeared in the sci-fi movie.
レールガンは電磁力で弾丸を発射する。
A railgun fires projectiles using electromagnetic force.