Definition of Zirconium 1. A lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon Noun Synonyms for word "zirconium" Semanticaly linked words with "zirconium" Hyponims for word "zirconium" has derived form zircon etymology nonzirconium etymology organozirconium etymology radiozirconium etymology zirkonium etymologically related zircon etymologically related zircona etymologically related zirconia is derived from cubic zirconium oxide is derived from potassium zirconium fluoride is derived from zircalloy is derived from zircaloy is derived from zirco- is derived from zirconio- is derived from zirconium carbide is derived from zirconium dioxide is derived from zirconium nitride is derived from zirconium oxide is derived from zirconium tetrachloride is derived from zircono-