Simple Definition of cobalt

from our Learner's Dictionary

cobalt

noun

ˈkoʊˌbɑːlt How to pronounce cobalt (audio)
: a hard, shiny, silver-white metal that is often mixed with other metals

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“Cobalt.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/cobalt. Accessed 22 Jun. 2026.

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