adj

• (rail transport) Describing a train, system, etc, that operates by magnetic levitation.
  "A “moving platform” scheme[…]is more technologically ambitious than maglev trains even though it relies on conventional rails. Local trains would use side-by-side rails to roll alongside intercity trains and allow passengers to switch trains by stepping through docking bays. This set-up solves several problems […]. Stopping high-speed trains wastes energy and time, so why not simply slow them down enough for a moving platform to pull alongside?"

noun

• (rail transport) A train supported by magnetic levitation.
  "When finished, the trains will be the fastest commercial maglevs developed and built completely by Chinese firms."