Found 2 items, similar to hafnium.
English → English (WordNet)
Definition: hafnium
hafnium
n : a gray tetravalent metallic element that resembles zirconium
chemically and is found in zirconium minerals; used in
filaments for its ready emission of electrons [syn:
Hf,
atomic number 72]
English → English (gcide)
Definition: hafnium
hafnium
\haf"ni*um\ (h[a^]f"n[=e]*[u^]m or h[aum]f"n[=e]*[u^]m),
n.
A metallic element of atomic number 72 present together with
zirconium to the extent of 1% to 5% in zirconium minerals. It
is a poisonous, ductile metal with a brilliant silver luster,
has an atomic weight of 178.49, and has a high melting point
(2227[deg] C). It is used in nuclear reactors, and
incandescent lamps as a scavenger of oxygen and nitrogen. See
also
norium.
[1913 Webster]