rare earth
Kelime Anlamı :

1. Lantanidler ya da nadir toprak elementleri, geçiş metallerinin bir alt serini oluştururlar ve toprakta çok az miktarda bulunurlar.
2. nadir element.
3. nadir toprak elementleri.
Tanımlar :
1. any of various oxides of the rare-earth elements.
2. A rare-earth element.
from The American Heritage® Dictionary of the English Language, 4th Edition
1. naturally occurring oxides of the lanthanide metals; they are widely distributed in relatively small concentrations and are used in glassmaking, ceramic glazes etc
from Wiktionary, Creative Commons Attribution/Share-Alike License
1. any element of the lanthanide series (atomic numbers 57 through 71)
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.