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View synonyms for rare-earth element

rare-earth element

[ rair-urth ]

noun

, Chemistry.
  1. 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

/ râr′ûrth′ /

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Word History and Origins

Origin of rare-earth element1

First recorded in 1955–60

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