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English definition of “magnesium”

magnesium

noun [U] uk   /mæɡˈniː.zi.əm/ (symbol Mg) us  
a chemical element that is a silver-white metal. Magnesium burns very brightly and is used in making fireworks.MineralogyChemical elements
(Definition of magnesium from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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