Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun atomic_number_72

1 sense of atomic number 72

Sense 1
hafnium, Hf, atomic number 72 -- (a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons)
       => metallic element, metal -- (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)