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rare earth element

Noun CEFR C1

Definitions

Any of a group of seventeen soft, lustrous, sometimes magnetic metals that form trivalent salts, which includes the lanthanides plus yttrium and scandium.

Equivalents

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CEFR level

C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
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See also

Rare Earth hypothesis rare earth magnet rare earth metal rare earth mineral rare gas rare groove

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