hafnium
/ˈhæfniəm/
noun
- A hard, silver-gray metallic chemical element (symbol Hf) used in nuclear reactors and electronic components.
- Hafnium alloys are important in the production of microchips.
- The scientist explained how hafnium resists corrosion at high temperatures.
- Hafnium is often used to make control rods for nuclear reactors.