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cobalt Definition
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cobalt
noun(co-balt)a magnetic metallic element that is used especially in alloys, in batteries, and as a pigment in paint and glass
cobalt
noun(co-balt)cobalt blue
cobalt
noun(co-balt)a greenish-blue pigment consisting essentially of cobalt oxide and alumina
cobalt
noun(co-balt)a strong greenish blue
cobalt
noun(co-balt)a chloride of cobalt; especially : the dichloride CoCl2 that is blue when dehydrated, turns red in the presence of moisture, and is used to indicate humidity
cobalt
noun(co-balt)a heavy radioactive isotope of cobalt of the mass number 60 produced in nuclear reactors and used as a source of gamma rays (as for radiotherapy)