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 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 The first step was examining the beads’ levels of magnesium oxide (MgO) and ratio of MgO to aluminum oxide (Al2O3). Tom Hawking, Popular Science, 5 Sep. 2024 See all Example Sentences for magnesium oxide 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'magnesium oxide.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 31 Oct. 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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