What does A Scientific Railgun mean?

A Scientific Railgun meaning in Urban Dictionary

An anime show. Better known as To Aru Kagaku no Railgun (とある科学の超電磁砲<レールガン> / "To Aru Kagaku no Reerugan"). A side story of To Aru Majutsu no Index (とある魔術の禁書目録<インデックス> / "To Aru Majutsu no Indekkusu"). This part series is targeted on another main character, Mikoto Misaka (御坂美琴 / "Misaka Mikoto"), a Level 5 esper, nicknamed "Railgun" because of her capability to adjust electrical energy, to permit the utilization of a special move that enables the woman to fire a projectile at many times the speed of noise. This "move" resembles a actual railgun, a experimental Navy weapon which fires a projectile utilizing electromagnetic power.