American Heritage® Dictionary of the English Language, Fourth Edition
- n. Any of various oxides of the rare-earth elements.
- n. A rare-earth element.
- n. chemistry naturally occurring oxides of the lanthanide metals; they are widely distributed in relatively small concentrations and are used in glassmaking, ceramic glazes etc
- n. any element of the lanthanide series (atomic numbers 57 through 71)
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race relations, rack bar, rack-raking machine, radial drainage, radial flow to a ..., radial gate, radial gate with ..., radial tyre, radial velocity, radial velocity o..., radial water coll..., radial-gate weir and 4474 more...
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