3 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Magnesium \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, 1.75.
{Magnesium sulphate}. (Chem.) Same as {Epsom salts}.
From WordNet r 1.6 [wn]:
magnesium
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) [syn: {Mg},
{atomic number 12}]
From Elements database 20001107 [elements]:
magnesium
Symbol: Mg
Atomic number: 12
Atomic weight: 24.312
Silvery metallic element belonging to group 2 of the periodic table
(alkaline-earth metals). It is essential for living organisms, and is used
in a number of light alloys. Chemically very reactive, it forms a
protective oxide coating when exposed to air and burns with an intense
white flame. It also reacts with sulphur, nitrogen and the halogens. First
isolated by Bussy in 1828.
more about magnesium
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