cobalt
/ˈkəʊbɔːlt/noun
mass noun
1- the chemical element of atomic number 27, a hard silvery-white magnetic metal. (Symbol: Co)（化学元素）钴（符号： Co）。
1.1
- short for COBALT BLUE.COBALT BLUE的简称：
as modifier a cobalt sky.钴蓝色的天空。
Cobalt is chiefly obtained as a by-product from nickel and copper ores. It is a transition metal similar in many respects to nickel. Its main use is as a component of magnetic alloys and those designed for use at high temperatures.
派生词
cobaltic
/kəʊˈbɔːltɪk/ adjectivecobaltous
/kəʊˈbɔːltəs/ adjective词源
late 17th cent.: from German Kobalt 'imp, demon' （because the presence of cobalt-bearing ore made it more difficult to extract silver, and miners believed that it was harmful to the silver ore with which it occurred）.