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Definition of alumina
: the oxide of aluminum Al2O3 occurring native as corundum and in hydrated forms (as in bauxite)
From the M-W Editors
Recent Examples of alumina from the Web
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Aluminum rose as China’s top state smelter suspends production capacity of intermediate material alumina.
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Sales slightly exceeded expectations amid rising prices for aluminum and the feedstock alumina.
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But by sealing the alumina cement compound along with titanium inside a glass tube and heating it to 1,100 degrees Celsius, the researchers were able to create a homogenized, symmetrical cage structure that conducts electricity like metal.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'alumina'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of alumina
New Latin, from Latin alumin-, alumen alum
Medical Dictionary
Learn More about alumina
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Britannica.com: Encyclopedia article about alumina
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