Adjective
electroless (not comparable)
(of a metal plating process) Without the use of an external electric current.
As a consequence of these characteristics, electroless deposition is quite common in the decorative arts. Source: Internet
In contrast, an electroless deposition process uses only one electrode and no external source of electric current. Source: Internet
To combat this, we’ve had the PCB coated in gold finishing (ENIG, or Electroless Nickel Immersion Gold). Source: Internet