Alumina Definition

ə-lo͝omə-nə
noun
Any of several forms of aluminum oxide, Al2 O3 , 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.
American Heritage
An oxide of aluminum, Al2O3, present in bauxite and clay and found as different forms of corundum, including emery, sapphires, and rubies.
Webster's New World

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

Wiktionary
Synonyms:

Other Word Forms of Alumina

Noun

Singular:
alumina
Plural:
aluminas

Origin of Alumina

  • New Latin alūmina from Latin alūmen alūmin- alum

    From American Heritage Dictionary of the English Language, 5th Edition

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

    From Wiktionary

Alumina Sentence Examples

  • Marggraf demonstrated that alumina was another constituent.

  • Aluminium, when pure and kept out of contact with siliceous matter, is only oxidized at a white heat, and then very slowly, into alumina, Al 2 O 3.

  • The term clay is often used by chemists to denote hydrated silicate of alumina (Al 2 O 3 2SiO 2.2H 2 O), of which kaolin or china clay is a fairly pure form.

  • The reduction is not due to electrolysis, but to the action of carbon on alumina, a part of the carbon in the charge being consumed and evolved as carbon monoxide gas, which burns at the orifice in the cover so long as reduction is taking place.

  • Filtration in the chemical laboratory is commonly effected by the aid of a special kind of unsized paper, which in the more expensive varieties is practically pure cellulose, impurities like feric oxide, alumina, lime, magnesia and silica having been removed by treatment with hydrochloric and hydrofluoric acids.

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Words Starting With

AALALU

Words Ending With

ANAINA

Unscrambles

alumina

Words Starting With A and Ending With A

Starts With A & Ends With AStarts With AL & Ends With AStarts With A & Ends With NA

Word Length

7 Letter Words7 Letter Words Starting With A7 Letter Words Ending With A