Magnesium oxide.
[Middle English, mineral ingredient of the philosophers' stone, from Medieval Latin magnēsia, from Greek magnēsiā, a kind of ore, from Magnēsiā, Magnesia, an ancient city of Asia Minor.]
magnesian mag·ne'sian adj.
magnesia
Dictionary:
mag·ne·sia (măg-nē'zhə, -shə)  |
n.
Magnesium oxide.
Magnesium oxide.
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| Architecture: magnesia |
A fine white powder of magnesium oxide; gives brick a yellow tint.
| Columbia Encyclopedia: magnesia |
magnesia, common name for the chemical compound magnesium oxide, MgO. It occurs as colorless, cubic crystals. It is refractory, melting at about 2,800°C. It is very slightly soluble in pure water but is soluble in acids and solutions of ammonium salts. The magnesia of commerce is a fine white powder used in soaps, cosmetics, pharmaceuticals, and as a filler in rubber goods. Magnesia is used to make crucibles and other ceramic goods. Crude magnesia is prepared by roasting dolomite (calcium magnesium double carbonate) or magnesite (magnesium carbonate). Pure magnesia is prepared by refining the crude product. Magnesia is also extracted from seawater. It occurs in nature as the mineral periclase.
| Veterinary Dictionary: magnesia |
Magnesium oxide; aperient and antacid.
| Wikipedia: Magnesia (disambiguation) |
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Look up Magnesia or magnesia in Wiktionary, the free dictionary. |
Places
- Magnesia, deriving from the Macedonian tribe name Magnetes, is the name of the southeastern area of Thessaly in central Greece.
- Magnesia was also the name of two cities in ancient Lydia (modern Turkey) founded by Greek Magnesians.
- One of them, Magnesia ad Sipylum is famous as the site of the Battle of Magnesia. Its ruins lie close to present day Manisa.
- The other was Magnesia ad Maeandrum which lay within Ionia, but because it had been settled by Aeolians from Magnesia of Greece, was not accepted into the Ionian League.
- In philosophy, Plato in his work Laws described a mythical city-state called Magnesia in which all aspects of life were codified in law.
Substances
- In geology, magnesia is a natural form of magnesium oxide, also called periclase.
- In alchemy and early chemistry, magnesia alba was the name for an indefinite hydrated mixture of magnesium hydroxide and magnesium carbonate.
- In chemistry, magnesia could refer to magnesium oxide.
See also
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Copyrights:
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 | Dictionary. The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved. Read more |
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| Architecture. McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc. All rights reserved. Read more |
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| Columbia Encyclopedia. The Columbia Electronic Encyclopedia, Sixth Edition Copyright © 2003, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/. Read more |
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| Veterinary Dictionary. Saunders Comprehensive Veterinary Dictionary 3rd Edition. Copyright © 2007 by D.C. Blood, V.P. Studdert and C.C. Gay, Elsevier. All rights reserved. Read more |
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| Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Magnesia (disambiguation)". Read more |
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Mentioned in
- albolite (materials)
- S glass (materials)
- magnesium oxychloride cement (materials)
- acid slag (metallurgy)
