Rare earth element

noun

Definitions

1.nounAny of a group of seventeen soft, lustrous, sometimes magnetic metals that form trivalent salts; they include the lanthanides plus yttrium, scandium, thorium and sometimes zirconium.

Synonyms

rare-earth element rare earth rare earth metal rare earth mineral lanthanide rare earth magnet yttrium transition element erbium lanthanite orthoferrite xenotite

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