Adjective
electrodeless (not comparable)
Without an electrode.
Electrodeless discharge lamps Electrodeless discharge lamps (EDL) contain a small quantity of the analyte as a metal or a salt in a quartz bulb together with an inert gas, typically argon gas, at low pressure. Source: Internet
Some drives (such as VASIMR or Electrodeless plasma thruster ) actually can significantly vary their exhaust velocity. Source: Internet