 rare-earth_element |
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| 1. | [ noun ] (chemistry) any element of the lanthanide series (atomic numbers 57 through 71) | |
| Synonyms: | rare_earth lanthanoid lanthanon lanthanide | |
| Related terms: | group chemical_element terbium_metal | |
| rare-earth_element |
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| 1. | [ noun ] (chemistry) any element of the lanthanide series (atomic numbers 57 through 71) | |
| Synonyms: | rare_earth lanthanoid lanthanon lanthanide | |
| Related terms: | group chemical_element terbium_metal | |
