zirconiumPronunciation: /zəːˈkəʊnɪəm/Definition of zirconium noun [mass noun] the chemical element of atomic number 40, a hard silver-grey metal of the transition series. (Symbol: Zr)Origin: early 19th century: modern Latin, from zirconzirconium in other Oxford dictionaries Definition of zirconium in the US English dictionary
