hafnium /ˈhafniəm 
/ ▸ noun [mass noun] (Symbol: Hf) the chemical element of atomic number 72, a hard silver-grey metal of the transition series, resembling and often occurring with zirconium. – ORIGIN 1920s: modern Latin, from Hafnia, Latinized form of Danish Havn, former name of Copenhagen.
EnglishOxford Dictionary of English
