magnesium oxide

noun

: a white highly infusible compound MgO used especially in refractories, cements, insulation, and fertilizers, in rubber manufacture, and in medicine as an antacid and mild laxative

Examples of magnesium oxide in a Sentence

Recent Examples on the Web

Poor bioavailability means that your body may not fully absorb magnesium oxide supplements.6 Magnesium Malate Magnesium malate is a type of supplement made from magnesium and malic acid (malate). —Elizabeth Barnes, Verywell Health, 16 July 2024

Indeed, instead of turning to rust, as steel eventually does, magnesium breaks down into magnesium oxide. —Bill McKibben, The New Yorker, 27 June 2024

Not only does the smelting process use just solar power and seawater, its main by-product is magnesium oxide, which, when released into the ocean, helps sequester carbon. —Bill McKibben, The New Yorker, 27 June 2024

Magnesium chloride may potentially be good for muscle pain, while magnesium oxide may treat migraines. —Kyle MacNeill, Vogue, 14 June 2024

Word History

First Known Use

1866, in the meaning defined above

Kids Definition

magnesium oxide

noun

: a white earthy solid that consists of magnesium and oxygen and is used especially in fertilizers and rubber, as a mild laxative, and against acid in the stomach

Medical Definition

magnesium oxide

noun

: a white highly infusible compound MgO used especially in refractories, cements, insulation, and fertilizers, in rubber manufacture, and in medicine as an antacid and mild laxative