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[uh-loo-muh-nuh m] /əˈlu mə nəm/
Chemistry. a silver-white metallic element, light in weight, ductile, malleable, and not readily corroded or tarnished, occurring combined in nature in igneous rock, shale, clay, and most soil: used in alloys and for lightweight utensils, castings, airplane parts, etc. Symbol: Al; atomic weight: 26.98; atomic number: 13; specific gravity: 2.70 at 20°C.
Abbreviation: alum.;
of, relating to, or containing aluminum:
an aluminum frying pan.
Also, especially British, aluminium.
Origin of aluminum
1812; < New Latin, alteration, by Humphry Davy, of alumium, which was first proposed; aluminium formed after other metals in -ium. See alumina, -ium
Related forms
[al-yuh-min-ik] /ˌæl yəˈmɪn ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for aluminum
Contemporary Examples
Historical Examples
  • The tensile strength of both soft copper and of aluminum wire is about 33,000 pounds per square inch of section.

  • These alloys are made of a combination of aluminum and magnesium.

    Flying Machines W.J. Jackman and Thos. H. Russell
  • Hunting arrows require no horn, bone, aluminum, or fiber nock.

  • It was an eight-foot section of aluminum from the cargo racks.

    Satellite System Horace Brown Fyfe
  • Metal, with the exception of aluminum, cut the intensity roughly about half.

    All In The Mind Gene L. Henderson
Word Origin and History for aluminum

1812, coined by English chemist Sir Humphry Davy (1778-1829), from alumina, name given 18c. to aluminum oxide, from Latin alumen "alum" (see alum). Davy originally called it alumium (1808), then amended this to aluminum, which remains the U.S. word, but British editors in 1812 further amended it to aluminium, the modern preferred British form, to better harmonize with other metallic element names (sodium, potassium, etc.).

Aluminium, for so we shall take the liberty of writing the word, in preference to aluminum, which has a less classical sound. ["Quarterly Review," 1812]

Online Etymology Dictionary, © 2010 Douglas Harper
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aluminum in Medicine

aluminum a·lu·mi·num (ə-lōō'mə-nəm)
Symbol Al
A silvery-white, ductile metallic element, found chiefly in bauxite. A good conductor, it is used in light, corrosion-resistant alloys. Atomic number 13; atomic weight 26.98; melting point 660.3°C; boiling point 2,519°C; specific gravity 2.70; valence 3.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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aluminum in Science
Symbol Al A lightweight, silvery-white metallic element that is ductile, is found chiefly in bauxite, and is a good conductor of electricity. It is the most abundant metal in the Earth's crust and is used to make a wide variety of products from soda cans to airplane components. Atomic number 13; atomic weight 26.98; melting point 660.2°C (1,220.36°F); boiling point 2,467°C; specific gravity 2.69; valence 3. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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