cadmium

cadmium
[ˈkadmɪəm]
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

语源

early 19th cent.: from Latin cadmia 'calamine', so named because it is found with calamine in zinc ore. Compare with calamine