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rare earth

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noun Chemistry.
the oxide of any of the rare-earth elements contained in various minerals.
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Origin of rare earth

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use rare earth in a sentence

British Dictionary definitions for rare earth

rare earth

noun
any oxide of a lanthanide
Also called: rare-earth element another name for lanthanide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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