Noun
English Wikipedia has an article on:coilgunWikipedia
coilgun (plural coilguns)
Any of various devices that use electromagnets to accelerate a magnetic projectile via non contact means
Although any device used to propel a ballistic payload is technically a mass driver, in this context a mass driver is essentially a coilgun that magnetically accelerates a package consisting of a magnetizable holder containing a payload. Source: Internet
ETC requires much less energy input from outside sources, like a battery, than a railgun or a coilgun would. Source: Internet