hepatizon UK /ˌhɛpəˈtaɪ̯zɒn/US /ˌhɛpəˈtaɪ̯zɑn/ noun2 •A valuable metal alloy in antiquity, thought to have been an alloy of copper with gold and silver, mixed and treated to produce a material with a dark purplish patina. •chloasma
