| NOUN | substance | Pt, platinum, atomic number 78 | a heavy precious metallic element |
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| Meaning | A heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits. | |
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| Synonyms | platinum, atomic number 78 | |
| Broader | noble metal | Any metal that is resistant to corrosion or oxidation |