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Dictionary

rare'-earth' el"ement

Pronunciation: (râr'ûrth'), [key] Chem.
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. Also called rare'-earth' met"al.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

rare earth

raree show

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