magnesium oxide

noun Chemistry.

Origin:
1905–10

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Collins
World English Dictionary
magnesium oxide
 
n
Also called: magnesia a white tasteless substance occurring naturally as periclase: used as an antacid and laxative and in refractory materials, such as crucibles and fire bricks. Formula: MgO

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

magnesium oxide n.
A white powdery compound having a high melting point (2,800°C), used in food packaging, cosmetics, and pharmaceuticals.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
When the magnesium is all converted into magnesium oxide you return it to the store and get some new stuff.
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