|
|
1. (n.) lanthanum
a rare-earth, trivalent, metallic element, allied to aluminum, found in certain minerals, as monazite.
Etymology: (1580–90; alter. by folk etym. (lanterns formerly had reflectors made of horn))
|
| Definition of 'Lanthanum' |
Princeton's WordNet |
|
1. (noun) lanthanum, La, atomic number 57
a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
|
| Definition of 'Lanthanum' |
Webster Dictionary |
|
1. (noun) Lanthanum
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
|
| Definition of 'Lanthanum' |
U.S. National Library of Medicine |
|
1. Lanthanum
Lanthanum. The prototypical element in the rare earth family of metals. It has the atomic symbol La, atomic number 57, and atomic weight 138.91. Lanthanide ion is used in experimental biology as a calcium antagonist; lanthanum oxide improves the optical properties of glass.
|
|
|
|
|
| Alternative search options for 'Lanthanum' |
|
|
|
|
|
|
|
Definitions of Lanthanum 
