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1. WordNet® 3.0 (2006) |
lanthanum
n 1: a white soft metallic element that tarnishes readily;
occurs in rare earth minerals and is usually classified as
a rare earth [syn: lanthanum, La, atomic number 57]
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2. The Collaborative International Dictionary of English v.0.48 |
Lanthanum \Lan"tha*num\ (l[a^]n"th[.a]*n[u^]m), n. [NL., fr. Gr.
lanqa`nein to lie hid, to be concealed.] (Chem.)
A rare element of the rare earth group of the metals, of
atomic number 57, allied to aluminum. It occurs in certain
rare minerals, as cerite, gadolinite, orthite, etc., and was
so named from the difficulty of separating it from cerium,
didymium, and other rare earth elements with which it is
usually associated. Atomic weight 138.9. Symbol La. [Formerly
written also lanthanium.]
[1913 Webster]
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3. The Elements (07Nov00) |
lanthanum
Symbol: La
Atomic number: 57
Atomic weight: 138.9055
(From the Greek word lanthanein, to lie hidden) Silvery metallic element
belonging to group 3 of the periodic table and oft considered to be one
of
the lanthanoids. Found in some rare-earth minerals. Twenty-five natural
isotopes exist. La-139 which is stable, and La-138 which has a half-life
of 10^10 to 10^15 years. The other twenty-three isotopes are
radioactive.
It resembles the lanthanoids chemically. Lanthanum has a low to moderate
level of toxicity, and should be handled with care. Discovered in 1839
by
C.G. Mosander.
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Common Misspellings > |
lanthanum alanthanum alnthanum lalnthanum anthanum llanthanum lnathanum lanathanum lnthanum laanthanum latnhanum lantnhanum lathanum lannthanum lanhtanum lanthtanum lanhanum lantthanum lantahnum lanthahnum lantanum lanthhanum lanthnaum lanthanaum lanthnum lanthaanum lanthaunm lanthanunm lanthaum lanthannum lanthanmu lanthanumu lanthanm lanthanuum lanthanmum lanthanu lanthanumm ianthanum lianthanum ilanthanum oanthanum loanthanum olanthanum panthanum lpanthanum planthanum kanthanum lkanthanum klanthanum ,anthanum l,anthanum ,lanthanum .anthanum l.anthanum .lanthanum lqnthanum laqnthanum lqanthanum lwnthanum lawnthanum lwanthanum lsnthanum lasnthanum lsanthanum lxnthanum laxnthanum lxanthanum lznthanum laznthanum lzanthanum l nthanum la nthanum l anthanum lenthanum linthanum lonthanum lunthanum lagthanum langthanum lagnthanum lahthanum lanhthanum lahnthanum lajthanum lanjthanum lajnthanum labthanum lanbthanum labnthanum lamthanum lanmthanum lamnthanum la thanum lan thanum la nthanum lan5hanum lant5hanum lan5thanum lan%hanum lant%hanum lan%thanum lan6hanum lant6hanum lan6thanum lanrhanum lantrhanum lanrthanum lanyhanum lantyhanum lanythanum lanfhanum lantfhanum lanfthanum langhanum lantghanum langthanum lanhhanum lanthhanum lanhthanum lanttanum lanthtanum lantthanum lantyanum lanthyanum lantyhanum lantuanum lanthuanum lantuhanum lantganum lanthganum lantghanum lantjanum lanthjanum lantjhanum lantbanum lanthbanum lantbhanum lantnanum lanthnanum lantnhanum lantmanum lanthmanum lantmhanum lant anum lanth anum lant hanum lanthqnum lanthaqnum lanthqanum lanthwnum lanthawnum lanthwanum lanthsnum lanthasnum lanthsanum lanthxnum lanthaxnum lanthxanum lanthznum lanthaznum lanthzanum lanth num lantha num lanth anum lanthenum lanthinum lanthonum lanthunum lanthagum lanthangum lanthagnum lanthahum lanthanhum lanthahnum lanthajum lanthanjum lanthajnum lanthabum lanthanbum lanthabnum lanthamum lanthanmum lanthamnum lantha um lanthan um lantha num lanthan7m lanthanu7m lanthan7um lanthan&m lanthanu&m lanthan&um lanthan8m lanthanu8m lanthan8um lanthanym lanthanuym lanthanyum lanthanim lanthanuim lanthanium lanthanhm lanthanuhm lanthanhum lanthanjm lanthanujm lanthanjum lanthankm lanthanukm lanthankum lanthanam lanthanem lanthanom lanthanuj lanthanumj lanthanujm lanthanuk lanthanumk lanthanukm lanthanul lanthanuml lanthanulm lanthanun lanthanumn lanthanunm lanthanu lanthanum lanthanu m Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. What does mispell meen? It Meens...
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