aluminum-oxide

aluminum oxide

noun
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alumina

[uh-loo-muh-nuh]
noun
the natural or synthetic oxide of aluminum, Al 2 O 3 , occurring in nature in a pure crystal form as corundum.
Also called aluminum oxide.


Origin:
1780–90; < Latin alūmin-, stem of alūmen alum1 + -a4

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
alumina (əˈluːmɪnə)
 
n
another name for aluminium oxide
 
[C18: from New Latin, plural of Latin alūmenalum]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
alumina   (ə-l'mə-nə)  Pronunciation Key 
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.
aluminum oxide  
See alumina.
The American Heritage® Science Dictionary
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