| NOUN | substance | ruthenium, Ru, atomic number 44 | a rare polyvalent metallic element of the platinum group |
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| Meaning | A rare polyvalent metallic element of the platinum group; it is found associated with platinum. | |
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| Synonyms | Ru, atomic number 44 | |
| 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. |
| Spanish | número atómico 44, Ru, rutenio | |
| Catalan | número atòmic 44, Ru, ruteni | |
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