Gadolinium (noun)

1. A rare earth element with the atomic number 64.
2. A silvery-white metallic element that is relatively stable in air.

Origin:

Named after the finnish chemist j. gadolin (1760–1852), who first isolated it from a mineral.

Examples:

1. Gadolinium is used in various high-tech applications such as magnetic resonance imaging (MRI) and nuclear reactors.
2. Gadolinium compounds are used as phosphors in television and computer screens.
3. Gadolinium is a key component in the production of compact discs and DVDs.
4. The use of gadolinium in medical imaging has been criticized due to its potential toxicity.
5. Gadolinium is relatively expensive due to its scarcity and the difficulty of extraction.