pentasulphideWiktionary 原文英美构词拆解pentapenta-前缀sulphidesulphide词干penta-Five.词源说明From penta- + sulphide.释义名词noun1(chemistry) any sulphide containing five sulphur atoms in each molecule同族词派生词 6antimony pentasulfide·antimony pentasulphide·pentasulfide antimony