rare earth
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English
Etymology
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium. Particularly: “When did the term start to be used?”)
Noun
rare earth (plural rare earths)
- (chemistry) Any of the naturally occurring oxides of the lanthanide metals; they are widely distributed in relatively small concentrations and are used in glassmaking, ceramic glazes etc.
- a rare earth element
Derived terms
Translations
naturally occurring oxide of the lanthanide metals
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Further reading
rare-earth element on Wikipedia.Wikipedia - “rare earth”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
