| NOUN | substance | erbium, Er, atomic number 68 | a trivalent metallic element of the rare earth group |
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| Meaning | A trivalent metallic element of the rare earth group; occurs with yttrium. | |
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| Synonyms | Er, atomic number 68 | |
| Broader | metallic element, metal | Any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
| Substance of | fergusonite | A dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals |
| gadolinite, ytterbite | A mineral that is a source of rare earths | |
| Spanish | erbio, Er, número atómico 68 | |
| Catalan | erbi, número atòmic 68 | |
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