Hafnium

//ˈhæfniəm// noun

Definitions

Noun
  1. 1
    A chemical element (symbol Hf) with an atomic number of 72: a lustrous, silvery-grey tetravalent transition metal. uncountable
  2. 2
    a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons wordnet

Etymology

From Latin Hafnia (“Copenhagen”) + -ium.

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