rare earth

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nounChemistry.
  1. the oxide of any of the rare-earth elements contained in various minerals.

Origin of rare earth

1
First recorded in 1875–80

Words Nearby rare earth

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How to use rare earth in a sentence

British Dictionary definitions for rare earth

rare earth

noun
  1. any oxide of a lanthanide

  2. Also called: rare-earth element another name for lanthanide

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