Magnesium Definition

Other Magnesium Definition

[n] a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)

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atomic number 12, Mg

Misc. Definitions

\Mag*ne"si*um\, n. [NL. & F. See {Magnesia}.] (Chem.) A light silver-white metallic element, malleable and ductile, quite permanent in dry air but tarnishing in moist air. It burns, forming (the oxide) magnesia, with the production of a blinding light (the so-called magnesium light) which is used in signaling, in pyrotechny, or in photography where a strong actinic illuminant is required. Its compounds occur abundantly, as in dolomite, talc, meerschaum, etc. Symbol Mg. Atomic weight, 24.
4. Specific gravity, 1.7
5. {Magnesium sulphate}. (Chem.) Same as {Epsom salts}.

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