rare earth


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Related to rare earth: Rare earth element, rare earth magnets

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 ?
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