magnesium oxide(redirected from calcined magnesia)
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A white powdery compound, MgO, having a high melting point (2,800°C), used in high-temperature refractories, electrical insulation, food packaging, antacids, cosmetics, and pharmaceuticals. Also called magnesia.
(Elements & Compounds) 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. Also called: magnesia
mag•ne•sia(mægˈni ʒə, -ʃə)
a white tasteless substance, magnesium oxide, MgO, used in medicine as an antacid and laxative. Compare milk of magnesia.
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|Noun||1.||magnesium oxide - a white solid mineral that occurs naturally as periclase; a source of magnesium|
atomic number 12, magnesium, Mg - 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)
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition