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
From the M-W Editors
1924
First Known Use of rare earth element
1924
Medical Dictionary
rare earth element
noun
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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