Meaning Of The Word Rare-earth element

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Rare-earth element Meaning

Rare-earth element Definition
Rare-earth element Definition

What's The Definition Of Rare-earth element?

rare-earth element in American English
any of the series of metallic chemical elements, with consecutive atomic numbers of 57 (lanthanum) through 71 (lutetium) inclusive
noun: any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons

rare-earth element in British English
noun: any element of the lanthanide series

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