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Word of the Day Tuesday, June 9, 2026

cobalt

/kəˈboʊlt/ noun · British & US
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What does cobalt mean?

noun

A hard, blue-gray or blue-white metallic element, used in alloys and as a pigment. It is also used in the manufacture of magnets and in the production of blue glass and ceramics.

Example

"The artist used cobalt to create a vibrant blue hue in her painting."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for cobalt

Antonyms of cobalt

Rhymes with cobalt

Etymologically related