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magnesium

noun [U]
 
 
/mæɡˈniː.zi.əm/ (symbol Mg)

Definition

a chemical element that is a silver-white metal. Magnesium burns very brightly and is used in making fireworks.MineralogyChemical elements
(Definition of magnesium noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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