English Lexicon

Cobalt

/ˈkoʊ.bɔlt/
nounCEFR B2 (Upper)Top #1500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A hard, lustrous, gray metal used in alloys and as a pigment.

    "Cobalt is often used in the production of high-strength alloys for jet engines."
  2. 2

    A chemical element with the symbol Co and atomic number 27.

    "The periodic table lists cobalt as a transition metal."

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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

The term 'cobalt' originates from the German word 'Kobalt' or 'Kobold', which means 'goblin' or 'evil spirit', referring to the toxic nature of cobalt ores. It was first used in the 17th century when cobalt was identified as a distinct element.

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