cadmium
/ˈkædmɪəm/noun
mass noun
- the chemical element of atomic number 48, a silvery-white metal. (Symbol: Cd)（化学元素）镉（符号：Cd）。
Cadmium occurs naturally in zinc ores and is obtained as a by-product of zinc smelting. It is used as a component in low melting point alloys and as a corrosion-resistant coating on other metals.
词源
early 19th cent.: from Latin cadmia 'calamine', so named because it is found with calamine in zinc ore. Compare with CALAMINE.