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Rare Earth Ore
2005-05-25 18:46:47

A rare earth is an oxide of a rare earth element. Often rare earth elements themselves are loosely called "rare earths". As to exactly what is a "rare earth" element is a matter of some ambiguity. The narrowest definition restricts it to the lanthanides, which are lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium,...

Word of the Day
edulcoration
  • The act of sweetening by admixture of some saccharine substance.
The word 'edulcoration' comes from a Latin word meaning 'making sweet'.