Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of several forms of aluminum oxide, Al2O3, occurring naturally as corundum, in a hydrated form in bauxite, and with various impurities as ruby, sapphire, and emery, used in aluminum production and in abrasives, refractories, ceramics, and electrical insulation.

from The Century Dictionary.

  • noun The oxid of aluminium, Al2O3, the most abundant of the earths.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Aluminum oxide used especially in mining, material sciences and ceramics.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any of various forms of aluminum oxide occurring naturally as corundum

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin alūmina, from Latin alūmen, alūmin-, alum.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From (combining form of) Latin alumen + -a.

Examples

Comments

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  • aluminum occurring in the wild.

    October 24, 2007