• WordNet 3.6
    • n magnesia a white solid mineral that occurs naturally as periclase; a source of magnesium
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Webster's Revised Unabridged Dictionary
    • n Magnesia (Chem) A light earthy white substance, consisting of magnesium oxide (MgO), and obtained by heating magnesium hydrate or carbonate, or by burning magnesium. It has a slightly alkaline reaction, and is used in medicine as a mild antacid laxative. See Magnesium.
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Century Dictionary and Cyclopedia
    • n magnesia A mineral said to be brought from Magnesia.
    • n magnesia Magnesium oxid (MgO), a white tasteless substance having a feeble alkaline reaction. Its specific gravity varies from 3.07 to 3.61. It is nearly insoluble in water, and scarcely fuses at the temperature of the oxyhydrogen flame. It is prepared by the ignition of any magnesium salt of a volatile acid. Magnesia is used in medicine as an antacid and mild cathartic, and in the arts for preparing magnesium salts. Magnesia alba, the magnesia of the shops, is a hydrated magnesium carbonate. Calcined magnesia is pure magnesia prepared by strongly heating the carbonate.
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Chambers's Twentieth Century Dictionary
    • n Magnesia a light white powder, got by burning magnesium, used as a medicine
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Webster's Revised Unabridged Dictionary
L. Magnesia, fem. of Magnesius, of the country Magnesia, Gr. h` Magnhsi`a li`qos a magnet. Cf. Magnet


In literature:

Beautifully clear, but strongly charged with sulphur, magnesia, soda, and iron.
"Jack at Sea" by George Manville Fenn
Do not check it, but allow it to have its course, and take a little rhubarb or magnesia.
"Searchlights on Health: Light on Dark Corners" by B.G. Jefferis
Magnesia is generally found in small quantity.
"Elements of Agricultural Chemistry" by Thomas Anderson
To each flask add 2 grammes of calcined magnesia, then connect up with condensers and distil.
"The Elements of Bacteriological Technique" by John William Henry Eyre
Oh, she may make a few wry faces, as she does when swallowing magnesia, but the dose will go down.
"She Would Be a Soldier" by Mordecai Manuel Noah
The triple phosphate of magnesia-and-ammonia calculus.
"North American Medical and Surgical Journal, Vol. 2, No. 3, July, 1826" by Various
I don't suppose Lord George wants magnesia as yet, but you will understand what I mean.
"Is He Popenjoy?" by Anthony Trollope
In this connection the presence of magnesia in the feed or water must be named as favoring calculous formations in the urinary passages.
"Special Report on Diseases of Cattle" by U.S. Department of Agriculture
De acido e cibis orlo, et de magnesia, reprinted at Edinburgh, 1854.
"A History of Science, Volume 5(of 5)" by Henry Smith Williams
Magnesia is injurious when present in too large quantities.
"The Elements of Agriculture" by George E. Waring

In news:

Using Vicks or milk of magnesia may lessen facial dandruff.
The company produces roughly 70,000 metric tons of sintered magnesia annually in the north of Dublin and has 110 employees.
In addition to the stop-off s mentioned last time, please note that milk of magnesia, readily and cheaply available from many drug and food stores, is actually a decent stop-off that may prove effective for many general-purpose needs.
Milk of magnesia has been used for decades to help constipation.
RHI recently announced it has built one of the largest fusion plants for magnesia raw materials for more than €75 million (~ $95 million) in Norway.
Pass the Milk of Magnesia baby Unc Imo is the new Suga Daddy in the rap game pushing 60 years of Gangster who needs Trey Songz or Drake when you've got you a Suga Daddy.

In science:

Magnetic forces were also known by the time of the Greeks due to the property of magnetized ore that could be used as ‘lodestones’ and were mined in the Magnesia prefecture of Thessaly, one of the thirteen peripheries of Greece.
Fundamental particles and their interactions