alumina

[ uh-loo-muh-nuh ]

/ əˈlu mə nə /

noun

the natural or synthetic oxide of aluminum, Al2O3, occurring in nature in a pure crystal form as corundum.

Also called aluminum oxide.

Origin of alumina

1780–90; <Latin alūmin-, stem of alūmenalum¹ + -a⁴

Words nearby alumina

ALU, aludel, alula, alum, alumin-, alumina, alumina cement, aluminate, aluminated, aluminiferous, aluminite

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for alumina

Clay, to be precise, is a silicate of alumina, a term which is interesting when it is explained.
The Romance of War Inventions|Thomas W. Corbin
Can we then use "red liquor" (acetate of alumina), acetate of iron, copperas, etc.?
The Chemistry of Hat Manufacturing|Watson Smith
This being the case, it is not surprising that repeated attempts have been made to effect the crystallization of alumina.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5|Various
The mordant for a full red may be acetate of alumina, of spec.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

Brunswick Green, originally a crude chloride of copper, is now generally a mixture of carbonate of copper and chalk or alumina.
Poisons: Their Effects and Detection|Alexander Wynter Blyth

British Dictionary definitions for alumina

alumina

/ (əˈluːmɪnə) /

noun

another name for aluminium oxide

Word Origin for alumina

C18: from New Latin, plural of Latin alūmen alum

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for alumina

alumina

[ ə-lōō′mə-nə ]

Any of several forms of aluminum oxide used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Alumina occurs naturally as the mineral corundum and, with minor traces of chromium and cobalt, as the minerals ruby and sapphire, respectively. In its hydrated form it also occurs as the rock bauxite. Also called aluminum oxide. Chemical formula: Al2O3.

单词	alumina
释义	alumina [ uh-loo-muh-nuh ] / əˈlu mə nə / noun the natural or synthetic oxide of aluminum, Al2O3, occurring in nature in a pure crystal form as corundum. Also called aluminum oxide. Origin of alumina 1780–90; <Latin alūmin-, stem of alūmenalum¹ + -a⁴ Words nearby alumina ALU, aludel, alula, alum, alumin-, alumina, alumina cement, aluminate, aluminated, aluminiferous, aluminite Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for alumina Clay, to be precise, is a silicate of alumina, a term which is interesting when it is explained. The Romance of War Inventions\|Thomas W. Corbin Can we then use "red liquor" (acetate of alumina), acetate of iron, copperas, etc.? The Chemistry of Hat Manufacturing\|Watson Smith This being the case, it is not surprising that repeated attempts have been made to effect the crystallization of alumina. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5\|Various The mordant for a full red may be acetate of alumina, of spec. A Dictionary of Arts, Manufactures and Mines\|Andrew Ure Brunswick Green, originally a crude chloride of copper, is now generally a mixture of carbonate of copper and chalk or alumina. Poisons: Their Effects and Detection\|Alexander Wynter Blyth British Dictionary definitions for alumina alumina / (əˈluːmɪnə) / noun another name for aluminium oxide Word Origin for alumina C18: from New Latin, plural of Latin alūmen alum Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for alumina alumina [ ə-lōō′mə-nə ] Any of several forms of aluminum oxide used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation. Alumina occurs naturally as the mineral corundum and, with minor traces of chromium and cobalt, as the minerals ruby and sapphire, respectively. In its hydrated form it also occurs as the rock bauxite. Also called aluminum oxide. Chemical formula: Al2O3. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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