zirconium /zɜːɹˈkoʊniəm/ noun1 •A chemical element (symbol Zr) with an atomic number of 40, a strong, lustrous, grey-white transition metal mainly used as a refractory and opacifier.Do you like how I dance? / I've got zirconium pants / Consequential enough / To slip you into a trance — 2005 formszirconiums