'Zirconium' definitions:

Definition of 'zirconium'

From: WordNet
noun
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 [syn: zirconium, Zr, atomic number 40]

Definition of 'Zirconium'

From: GCIDE
  • Zirconium \Zir*co"ni*um\, n. [NL.] (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. [1913 Webster]

Definition of 'Zirconium'

From: Elements
  • 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.