from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Chiefly British Variant of aluminum.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A light, silvery metal extracted from bauxite, and a chemical element (symbol Al) with an atomic number of 13.
from the GNU version of the Collaborative International Dictionary of English
- n. same as aluminum, chiefly British in usage.
from The Century Dictionary and Cyclopedia
- n. Chemical symbol Al; atomic weight 27.1. A metal of silver-white color and brilliant luster, about as hard as zinc, very malleable and ductile, highly sonorous, and a good conductor of heat and electricity.
- n. Aluminium melts at 654.5° C., and the tensile strength of bars made of it is about 28,000 pounds a square inch. The commercial production of the metal began about 1888, the process most largely used, as at Pittsburg and Niagara, being that of Hall, in which anhydrous alumina from bauxite is dissolved in a bath of fused cryolite in the presence of carbon and electrolyzed by a current of 6 or 7 volts and 7,000 amperes. The price has been brought down from $15 to 30 cents a pound, and the annual output increased from 3 to many thousand tons per annum. The only moderate strength of the metal, certain difficulties in working it (as, for instance, in soldering), and its chemical alterability under some conditions have tended to limit its applications. Among the more recent uses made of it may be mentioned the etching of designs for theatrical and other posters, substitution for copper in wire for the transmission of electric currents, the manufacture of a silver-like paint from the powder, and the production of a very high temperature by rapid combustion of the powder in admixture with sodium dioxid. See aluminothermics.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a silvery ductile metallic element found primarily in bauxite
Started to be used in 1812 as an alternative form of aluminum which was invented in the same year. (Wiktionary)