selenium
/səˈliniəm/
noun
- A chemical element that is a nonmetal, found in small amounts in soil and some foods, and important for human health.
- Selenium helps protect the body from damage caused by free radicals.
- Brazil nuts are one of the richest natural sources of selenium.
- Farmers sometimes add selenium to animal feed to keep livestock healthy.
- A gray or red solid form of this element used in electronics, glassmaking, and photocopiers.
- Some early solar cells were made with selenium instead of silicon.
- Old photocopiers used a drum coated with selenium to transfer images.
- Selenium is added to glass to remove green color or to make red glass.