Definitions for magnesium oxide
Random House Webster's College Dictionary
Ref: magnesia 1
Origin of magnesium oxide:
periclase, magnesia, magnesium oxide(noun)
a white solid mineral that occurs naturally as periclase; a source of magnesium
A white powder (MgO) with a high melting point; it occurs naturally as periclase, an ore of magnesium.
U.S. National Library of Medicine
Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media combines quickly with water to form magnesium hydroxide. It is used as an antacid and mild laxative and has many nonmedicinal uses.
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