zirconium.
(Of zircon).
1. m. chemical element of no. atóm. 40 Metal not very abundant in the Earth's crust, is almost always in the form of silicate in the zircon. Steely black or grey colour, it is refractory, bad driver of electricity and high mechanical resistance and corrosion. Used in filament lamps, tubes of vacuum and ceramic industries, chemical, aviation and nuclear. (Símb.) Zr).
