Fluoride (noun)

A compound of fluorine, especially one used to prevent tooth decay.

Origin:

From fluoro- + -ide, after the element fluorine.

Examples:

1. Fluoride is added to many brands of toothpaste to help prevent cavities.
2. The city adds fluoride to the public water supply to improve dental health.
3. Fluoride treatments are often recommended by dentists for children to strengthen their developing teeth.
4. Some people are concerned about the levels of fluoride in drinking water and its potential health effects.
5. Fluoride has been shown to be an effective and safe way to prevent tooth decay and improve oral health.