manganese
/ˈmæŋgəniːz/noun
mass noun
1- the chemical element of atomic number 25, a hard grey metal of the transition series. Manganese is an important component of special steels and magnetic alloys.（化学元素）锰（符号：Mn）。
1.1
- the black dioxide of this as an industrial raw material or additive, especially in glass-making（工业原料或添加剂, 尤用于玻璃制造）二氧化锰。
词源
late 17th cent.: via French from Italian manganese, unexplained alteration of medieval Latin magnesia （see MAGNESIA）.