About The Word Lanthanum
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Lanthanum
| Lanthanum Definition And Meaning |
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What's The Definition Of Lanthanum?
[n] a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
Synonyms | Synonyms for Lanthanum: atomic number 57 | La Related Terms | Find terms related to Lanthanum: See Also | metal | metallic element Lanthanum In Webster's Dictionary \Lan"tha*num\, n. [NL., fr. Gr. ? to lie hid, to be
concealed.] (Chem.)
A rare element of the group of the earth metals, allied to
aluminium. 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 elements with which it is usually associated. Atomic
weight 138.5. Symbol La. [Formerly written also
{lanthanium}.]
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