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magnesium
magnesium definition
mag·ne·sium (mag nē′zē əm, -z̸hē əm, -z̸həm)
noun
a lightweight, silver-white, malleable and ductile, metallic chemical element, one of the alkaline-earth metals, used in making several alloys and, because it burns with a hot, white light, in photographic flashbulbs, incendiary bombs, etc.: symbol, Mg; at. no., 12
Etymology: ModL < magnesia
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