Lexic.us

Definition of Magnesium

1. Noun. 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).

Definition of Magnesium

1. n. 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.

Definition of Magnesium

1. Noun. A light, flammable, silvery metal, and a chemical element (''symbol'' Mg) with an atomic number of 12. ¹

¹ Source: wiktionary.com

Definition of Magnesium

1. [n -S]

Medical Definition of Magnesium

1. An essential divalent cation. The major role is as the chelated ion in ATP and presumably other triphosphonucleotides. The magnesium ATP complex is the sole biologically active form of ATP. The other essential role of magnesium is as the central ion of chlorophyll. Cellular concentration is less than 5mM. Serum concentration approximately 1mM. Pharmacologic action: Hypomagnesemia can cause refractory ventricular fibrillation or ventricular tachycardia. Uses: known hypomagnesemic states - suspect hypomagnesmia in alcoholics, chronic disease states, or others with poor nutrition; treatment of choice for Torsade de Pointes. Dose: 1-2 grams IV push for cardiac arrest, over 1 to 2 minutes for Torsades, and over 5 to 60 minutes for acute myocardial infarction. Potential complications: Transient flushing and diaphoresis, sinus bradycardia, hypotension, hyporeflexia and paralysis with overdose. Abbreviation: Mg (15 Mar 2000)

Lexicographical Neighbors of Magnesium

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