alumina
noun
alu·mi·na
ə-ˈlü-mə-nə 
: the oxide of aluminum Al2O3 that occurs both in pure form as corundum and in hydrated forms (as in bauxite)
Examples of alumina in a Sentence
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The integrated alumina plant, equipped with its own power plant and jetty, is designed to produce up to 1.2 million tonnes of alumina during its initial phase.
—
Yessar Rosendar, Forbes, 19 Sep. 2024
The top layer of the disk is a four-micrometer circle of 40-nanometer gold membrane resting on a small piece of alumina on layer of silicon deposited on silica.
—IEEE Spectrum, 14 Nov. 2019
Strikes hit an alumina refinery and damaged warehouses containing fuel and caustic soda, potentially leaking highly alkaline bauxite residue into the waterway.
—Michael Birnbaum, Washington Post, 13 Mar. 2023
Producers refine an oxide from bauxite to create alumina, which is turned into aluminum metal at smelters.
—Micah Maidenberg, WSJ, 15 Jan. 2020
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Yessar Rosendar, Forbes, 19 Sep. 2024
The top layer of the disk is a four-micrometer circle of 40-nanometer gold membrane resting on a small piece of alumina on layer of silicon deposited on silica.
—IEEE Spectrum, 14 Nov. 2019
Strikes hit an alumina refinery and damaged warehouses containing fuel and caustic soda, potentially leaking highly alkaline bauxite residue into the waterway.
—Michael Birnbaum, Washington Post, 13 Mar. 2023
Producers refine an oxide from bauxite to create alumina, which is turned into aluminum metal at smelters.
—Micah Maidenberg, WSJ, 15 Jan. 2020
See all Example Sentences for alumina
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Cite this Entry
“Alumina.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alumina. Accessed 30 Nov. 2024.
Copy CitationKids Definition
alumina
noun
alu·mi·na
ə-ˈlü-mə-nə
: the oxide of aluminum that occurs in nature as corundum and in bauxite and is used as a source of aluminum, as an abrasive, and as an absorbent
Medical Definition
alumina
noun
alu·mi·na
ə-ˈlü-mə-nə
: an oxide of aluminum Al2O3 that occurs native as corundum and in hydrated forms (as in bauxite) and is used in antacids
called also aluminum oxide
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