any artifact that has been plated with a thin coat of metal by electrolysis
动词 electroplate:
coat with metal by electrolysis
electroplate详细解释
e.lec.tro.plate v.tr.(及物动词)e.lec.tro.plat.ed,e.lec.tro.plat.ing,e.lec.tro.plates To coat or cover with a thin layer of metal by electrodeposition.电镀:用电淀积法覆盖以一层薄金属层