magnesium oxide

noun

Definition of magnesium oxide

: 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

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Recent Examples of magnesium oxide from the Web

Lime plaster coatings or magnesium oxide boards have to be applied to anything touching hempcrete, or the lime will calcify it and lose its ability to absorb and release water.

— adam popescu, New York Times, "There’s No Place Like Home, Especially if It’s Made of Hemp," 29 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'magnesium oxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of magnesium oxide

1866

in the meaning defined above

See Words from the same year

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Medical Dictionary

magnesium oxide

noun

medical Definition of magnesium oxide

: 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