the branch of metallurgy having to do with the use of electricity, as for producing heat in smelting, refining, etc., or for refining, plating, or depositing metals by electrolysis
See electrometallurgy in American Heritage Dictionary 4
(ĭ-lĕkˌtrō-mĕtˈl-ûrˌjē)
noun
The use of electric and electrolytic processes to purify metals or reduce metallic compounds to metals.