beryllium
/bəˈrɪliəm/
noun
- A lightweight, strong, gray metal that is used in alloys, aerospace materials, and nuclear reactors.
- Beryllium is often added to copper to make strong, non-sparking tools.
- Scientists use beryllium in the windows of X-ray machines because it allows X-rays to pass through.
- The spacecraft's parts were made from a beryllium alloy to reduce weight.
Synonyms