rare earth (0 synonym found)

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rare earths  ยท  cave earth

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Definition of rare earth:

(n) : naturally occurring oxides of the lanthanide metals; they are widely distributed in relatively small concentrations and are used in glassmaking, ceramic glazes etc
Definition of rare earth:

(n) : naturally occurring oxides of the lanthanide metals; they are widely distributed in relatively small concentrations and are used in glassmaking, ceramic glazes etc
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