| 词汇 | cobalt |
| 词根词缀 | 词源： 1680s, from Ger. kobold "goblin," Harz Mountains silver miners' term for rock laced with arsenic and sulphur (so called because it made them ill), from M.H.G. kobe "hut, shed" + *holt "goblin," from hold "gracious, friendly," complimentary words used to avoid the wrath of troublesome beings. The metal was extracted from this rock. It was known to Paracelsus, but discovery is usually credited to Brandt (1733). Extended to a blue color 1835. |
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