- noun a silvery metallic element, used to absorb neutrons in nuclear reactor rods and in the manufacture of tungsten filaments
- A lustrous silvery metallic chemical element whose atomic number is 72. It is chemically similar to zirconium, is ductile, has good resistance to corrosion, and is a fine neutron absorber. It has around 30 known isotopes, of which 5 are stable. Its applications include its use in nuclear reactor control rods, and as a getter in lamps and electron tubes. Its symbol is Hf.
- chemical symbol Hf
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