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
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Poor bioavailability means that your body may not fully absorb magnesium oxide supplements.6 4. Brittany Lubeck, Ms, Rdn, Verywell Health, 20 Nov. 2024 Airborne features magnesium in the forms of magnesium oxide and magnesium sulfate, while Emergen-C uses magnesium hydroxide and magnesium carbonate. Megan Nunn, Verywell Health, 10 Oct. 2024 There are wallboards with much better water resistance, such as cement board or magnesium oxide board. Jamie Gold, Forbes, 8 Oct. 2024 Some beads were less than 1 percent magnesium oxide; others nearly 30 percent. John Timmer, Ars Technica, 5 Sep. 2024 See all Example Sentences for magnesium oxide 

Word History

First Known Use

1866, in the meaning defined above

Time Traveler
The first known use of magnesium oxide was in 1866

Dictionary Entries Near magnesium oxide

Cite this Entry

“Magnesium oxide.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnesium%20oxide. Accessed 7 Dec. 2024.

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

More from Merriam-Webster on magnesium oxide

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