The Collaborative International Dictionary
Hydrometallurgical
Hydrometallurgical \Hy`dro*met`al*lur"gic*al\, a. Of or pertaining to hydrometallurgy; involving the use of liquid reagents in the treatment or reduction of ores. -- Hy`dro*met`al*lur"gic*al*ly, adv.
Wiktionary
hydrometallurgical
a. Of or pertaining to hydrometallurgy