cobalt

cobalt
[ˈkəʊbɔːlt, -ɒlt]
noun

[mass noun]the chemical element of atomic number 27, a hard silvery-white magnetic metal(Symbol: Co)
（化学元素）钴(符号：Co)
■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 usu is as a component of magnetic alloys and those designed for use at high temperatures

派生
cobaltic
[kə(ʊ)ˈbɔːltɪk, -ˈbɒlt-]
adjective
cobaltous
[kə(ʊ)ˈbɔːltəs, -ˈbɒlt-]
adjective
语源

late 17th cent.: from German Kobalt 'imp, demon' (from the belief that cobalt was harmful to the ores with which it occurred)

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