3 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
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.
From WordNet r 1.6 [wn]:
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}]
From Elements database 20001107 [elements]:
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.
more about zirconium
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