cobalt: [17] German kobold means ‘goblin’: and in former times it was believed by German silver miners that impurities in the ore they were extracting, which lessened the value of the silver and even made them ill, were put there by these mischievous creatures. In fact these impurities were a silver-white metallic element, which was named kobalt after a Middle High German variant of kobold (the miners’ sickness was probably caused by the arsenic with which it occurred).
cobalt (n.)
1680s, from German kobold "household goblin," Harz Mountains silver miners' term for rock laced with arsenic and sulfur (so called because it degraded the ore and made the miners ill), from Middle High German kobe "hut, shed" + *holt "goblin," from hold "gracious, friendly," a euphemistic word for a troublesome being. The metallic element was extracted from this rock. It was known to Paracelsus, but discovery is usually credited to the Swede George Brandt (1733), who gave it the name. Extended to a blue color 1835 (a mineral containing it had been used as a blue coloring for glass since 16c.). Compare nickel.
实用例句
1. They walked past stalls selling huge sprays of crimson, saffron and cobalt flowers.
他们经过很多卖花的摊位，摊位上摆着大把大把的鲜花，有深红色的，有金黄色的，还有深蓝色的。
来自柯林斯例句
2. Sixty - five percent of the special heat resistant metal in a jet engine is made of cobalt.
喷气发动机中65%的特殊耐热金属材料是用钴制造的.
来自辞典例句
3. A new metal ore found in Northrend is Cobalt.
诺森德大陆上新的矿石叫做钴.
来自互联网
4. But she was wearing the cobalt raiment of the Angel of Death.
然而她却身穿着死亡天使的钴色衣裙.
来自互联网
5. Cobalt - based alloy is a kind of important materials used in elevated temperature.
