rare earth

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rare earth

n.
1. Any of various oxides of the rare-earth elements.
2. A rare-earth element.

[rare (because the minerals from which the rare-earth elements were first isolated are uncommon) + earth, metallic oxide.]

rare earth

n
1. (Elements & Compounds) any oxide of a lanthanide
2. (Elements & Compounds) Also called: rare-earth element another name for lanthanide

rare′ earth′


n.
the oxide of any of the rare-earth elements contained in various minerals.
[1875–80]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rare earth - any element of the lanthanide series (atomic numbers 57 through 71)
group, grouping - any number of entities (members) considered as a unit
terbium metal - a separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium
References in periodicals archive ?
Here, we meet three experts taking part in the UnEarthed event this month I'm like a human metal detector Anouk is a NERC-funded researcher at the University of St Andrews who explores ancient fossilised volcanoes for signs of rare earth metals.
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The selections that make up the main body of the text are organized by general subject into five parts devoted to rare metal processes, precious metals, rare earth metals, vanadium-molybdenum-tungsten, the poster session.