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Definition of: cobalt
(kō′bôlt) noun
A hard, brittle, magnetic metallic element (symbol Co, atomic number 27) usually found in iron and nickel ores, used in alloys, and biologically essential for the activity of several enzymes. See PERIODIC TABLE. [<G kobalt, var. of kobold goblin; so called by early miners who thought it a worthless, injurious ore]
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