Aluminum

n. malleable silvery metallic element used in alloys and in the manufacture of lightweight objects (Chemistry)

Aluminium (IPA: ) or aluminum (IPA: , see "spelling" below) is a silvery white and ductile member of the poor metal group of chemical elements. It has the symbol Al; its atomic number is 13. Aluminium is the most abundant metal in the Earth's crust, and the third most abundant element overall, after oxygen and silicon. It makes up about 8% by weight of the Earth’s solid surface. Aluminium is too reactive chemically to occur in nature as the free metal. Instead, it is found combined in over 270 different minerals . The chief source of aluminium is bauxite ore. Aluminium is remarkable for its ability to resist corrosion (due to the phenomenon of passivation) and its light weight. Structural components made from aluminium and its alloys are vital to the aerospace industry and very important in other areas of transportation and building.
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Noun
1. a silvery ductile metallic element found primarily in bauxite
(synonym) aluminium, Al, atomic number 13
(hypernym) metallic element, metal
(hyponym) alum, potassium alum, potash alum
(substance-holonym) aluminum foil, aluminium foil, tin foil
(derivation) aluminize, aluminise

(n.)
See Aluminium.
  

atomic symbol, Al, aluminum is the 13th element in the periodic table ( atomic number 13) with an atomic weight of 26.98, aluminum is a metal, an excellent conductor with a  resistivity of approximately 2.8µohm-cm, and is commonly used as an interconnect in integrated circuits and sometimes as a P-type dopant due to it's high diffusivity in silicon. Aluminum is commonly deposited by evaporation or sputtering.