rare earth

American  

noun

Chemistry.

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

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rare earth British  

noun

1. any oxide of a lanthanide

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

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Etymology

Origin of rare earth

First recorded in 1875–80

Example Sentences

See Examples For:

rare earth

Sweden has known rare earth mineral deposits in Kiruna, Bergslagen and Norra Kärr outside Gränna.

From Science Daily ● Jul. 24, 2026

Titan Mining, EnergyX, Ioneer, and REalloys received leases to process graphite, lithium, boron, and rare earth elements.

From The Wall Street Journal ● Jun. 25, 2026

He spoke of opportunities for co-operation particularly in accessing Somaliland's potential natural resources, including rare earth minerals and oil.

From BBC ● Jun. 16, 2026

But leaders will discuss issues including Beijing's dominance and control in the market for rare earth minerals used in everyday electronic appliances.

From Barron's ● Jun. 15, 2026

In 1797 Ekeberg showed that gadolinite contained another rare earth, which was given the name yttria.

From Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7 "Equation" to "Ethics" by Various