Polonium (noun)

A radioactive metallic chemical element with the atomic number 84.

Origin:

Early 20th century; named after poland, where it was discovered.

Examples:

1. Polonium is a highly toxic element, and its use as a poison has led to international controversy.
2. Polonium is produced in small amounts in nuclear reactors, and it is used in a variety of industrial applications.
3. Polonium is a rare element, and it is only found in trace amounts in the earth's crust.
4. Polonium has a number of unique properties, including its ability to emit alpha particles, which makes it useful in a variety of scientific and industrial applications.
5. Polonium is a dangerous substance, and handling it requires strict safety measures to protect workers and the environment.