Definition of lanthanum Lanthanum
/læˈnθʌnʌm/ - [lanthunum] - lan•tha•num
We found 7 definitions of lanthanum from 7 different sources.
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What does lanthanum mean?
WordNet
NounPlural: lanthanums |
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| lanthanum - a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth | ||
| La, atomic number 57 | ||
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Webster DictionaryWebster's Unabridged Dictionary 📘
- lanthanum (n.)
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.
OmegaWiki DictionaryOmegaWiki Dictionary Ω
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lanthanum
Chemical element with symbol La and atomic number 57. It is a silvery white metallic element that belongs to group 3 of the periodic table and is a lanthanide.
Chambers DictionaryChamber's 20th Century Dictionary 📕
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lanthanum
lan′tha-num, n. a metal discovered in 1839 in cerite, a hydrated silicate of cerium.—Also Lan′thānium. [Gr. lanthanein, to conceal.]
Wikipedia 
- Lanthanum is a chemical element. It has the chemical symbol La. It has the atomic number 57. It is part of a group of chemical elements in the periodic table named the Lanthanides. It is a rare earth element. It is silvery white, malleable and ductile. It is soft and can be cut with a knife.
Part of speech
🔤- lanthanum, noun, singular of lanthanums.
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