zir·co·ni·um /ˌzɝˈkoniəm/
 鋯


 zir·co·ni·um /(ˌ)zɝˈkonɪəm/ 名詞
 鋯


 Zir·co·ni·um n.  Chem. A rare element of the carbon-silicon group, intermediate between the metals and nonmetals, obtained from the mineral zircon as a dark sooty powder, or as a gray metallic crystalline substance. Symbol Zr. Atomic weight, 90.4.

 ◄ ►


 zirconium
      n : a lustrous gray 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
          [syn: Zr, atomic number 40]


 zirconium
 Symbol: Zr
 Atomic number: 40
 Atomic weight: 91.22
 Grey-white metallic transition element. Five natural isotopes and six
 radioactive isotopes are known. Used in nuclear reactors for a neutron
 absorber. Discovered in 1789 by Martin Klaproth, isolated in 1824 by
 Berzelius.