Scandium (noun)

1. A chemical element with the symbol Sc and atomic number 21. It is a silvery-white metal.
2. A silvery-white metal that is a rare earth element and has the chemical symbol Sc and atomic number 21.

Origin:

Late 19th century: from latin scandia "scandinavia", where the element was first discovered.

Examples:

1. Scandium is a reactive metal that is used in aircraft and aerospace applications.
2. The properties of scandium make it useful in the production of high-strength alloys.
3. Scandium is relatively scarce and expensive, which limits its use in commercial applications.
4. The discovery of scandium in the late 19th century was a major breakthrough in the field of chemistry.
5. The use of scandium in high-tech applications has increased the demand for this rare earth element.