RARE EARTH ELEMENT


Meaning of RARE EARTH ELEMENT in English

noun Date: 1924 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

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.