Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: German
Origin: kobalt, from kobold 'goblin'; because goblins were thought to mix it in with silver found in the ground

cobalt

noun
     
Related topics: Elements
co‧balt [uncountable]
1HCE a shiny silver-white metal that is often combined with other metals or used to give a blue colour to substances such as glass. It is a chemical element: symbol Co
2 also cobalt blue a bright blue-green colour
cobalt adjective

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