Definition of rare earth Rare earth
We found 2 definitions of rare earth from 2 different sources.
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What does rare earth mean?
WordNet
Noun |
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| rare earth - any element of the lanthanide series (atomic numbers 57 through 71) | ||
| rare-earth element, lanthanoid, lanthanide, lanthanon | ||
| group, grouping any number of entities (members) considered as a unit | ||
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Wiktionary 
- rare earth (Noun)
naturally occurring oxides of the lanthanide metals; they are widely distributed in relatively small concentrations and are used in glassmaking, ceramic glazes etc.
