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Lanthanum   Listen
noun
Lanthanum  n.  (Formerly written also lanthanium)  (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.






Collaborative International Dictionary of English 0.48








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Words linked to "Lanthanum" :   metallic element, atomic number 57, la



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