Dictionary

rare earth element

noun

Definition of RARE EARTH ELEMENT

:  any of a series of metallic elements of which the oxides are classed as rare earths and which include the elements of the lanthanide series and sometimes yttrium and scandium —called also rare earth metal

First Known Use of RARE EARTH ELEMENT

1924

rare earth element

noun    (Medical Dictionary)

Medical Definition of RARE EARTH ELEMENT

:  any of a series of metallic elements of which the oxides are classed as rare earths and which include the elements of the lanthanide series and sometimes yttrium and scandium—called also rare earth metal

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April 27, 2015
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