- 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. Abbreviation: alum.; Symbol: Al; atomic weight: 26.98; atomic number: 13; specific gravity: 2.70 at 20°C.
- of, relating to, or containing aluminum: an aluminum frying pan.
Origin of aluminum
Examples from the Web for aluminum
New refinements in aluminum made structures both stronger and lighter.Flight 8501 Poses Question: Are Modern Jets Too Automated to Fly?
January 4, 2015
According to police, Kory then attacked the victim with an aluminum tennis racket.Meet Your New ‘Hot Mugshot Guy’: Sean Kory, Fox News’ Public Enemy No. 1
November 3, 2014
In 2012, Li allegedly supplied the Iranians with 20,000 kilos of steel pipe and 1,300 aluminum alloy tubes.Tehran’s Chinese Missile Man
June 9, 2014
It is one of the only times I can think of when life imitates art to the very bleeding edge of an aluminum shank.Reading Prison Novels In Prison
May 24, 2014
While plentiful and cheap today, aluminum was once an extremely valuable metal.Weird Washington Monument History
May 12, 2014
These alloys are made of a combination of aluminum and magnesium.Flying Machines
W.J. Jackman and Thos. H. Russell
It was an eight-foot section of aluminum from the cargo racks.Satellite System
Horace Brown Fyfe
Only two materials are used in the construction of this hull, aluminum and mahogany.
Aluminum is not advisable for fittings when the boat is to be sailed in salt water.
And it is an aluminum alloy that is not nearly as heavy as it looks.
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]
- A silvery-white, ductile metallic element used in making dental alloys and forming compounds with pharmaceutical uses, especially as astringents and antiseptics. Atomic number 13.
- 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 26.9815; melting point 660.3°C (1,220.5°F); boiling point 2,519°C; specific gravity 2.70; valence 3. See Periodic Table.