magnesium oxide

noun

, Chemistry.

1. magnesia.

magnesium oxide

noun

1. 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 calledmagnesia

Word History and Origins

Origin of magnesium oxide¹

First recorded in 1905–10

Example Sentences

It used magnesium oxide boards, which do not burn, during testing and did not reveal this in marketing literature.

From BBC

The magnesium formed a thin layer of magnesium oxide on the tantalum surface that appears to keep oxygen from getting through.

From Science Daily

The inquiry heard 8mm fibre cement panels were added over the magnesium oxide to "conceal" its presence, making the whole system almost flush - but for the 2mm difference.

From BBC

That reaction would leave magnesium oxide powder, which when spread thin would rapidly react with CO2 from the atmosphere, re-forming magnesite, completing a cycle that could be repeated over and over.

From Science Magazine

The safety data sheet for Instantaneous Blast says that it contains diiron trioxide, magnesium oxide, zinc metal, potassium perchlorate, aluminum powder zirconium powder, and lead dithiocyanate, among other metallic compounds.

From Salon