Aluminum (noun)

1. A light, silvery-white metal that is soft and easily worked. It is a reactive element and is used in alloys, particularly with copper and magnesium, to make aircraft and spacecraft parts.
2. An item or material made of this metal.

Origin:

Mid 19th century: modern latin, based on earlier alumium, from latin alumen (see alum).

Examples:

1. The exterior of the building was made of aluminum.
2. Aluminum is used in construction because it is lightweight and durable.
3. The aluminum frame of the bike made it easy to carry.
4. I bought a set of aluminum cookware because it heats evenly.
5. The aluminum siding on the house was faded and needed to be replaced.