magnesium oxide

noun Chemistry.

magnesia.

Origin of magnesium oxide

First recorded in 1905–10

Words nearby magnesium oxide

magnesium, magnesium arsenate, magnesium carbonate, magnesium hydroxide, magnesium light, magnesium oxide, magnesium peroxide, magnesium salicylate, magnesium silicate, magnesium sulfate, magnesium trisilicate

British Dictionary definitions for magnesium oxide

magnesium oxide

noun

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

Medical definitions for magnesium oxide

magnesium oxide

n.

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