| NOUN | substance | platinum, Pt, atomic number 78 | a heavy precious metallic element |
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| Sounds | plae'tahnahm; plae'tnahm | |
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| Rhymes | abolitionism ... zirconium: 557 rhymes with ahm... | |
| 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 | Pt, atomic number 78 | |
| Broader | noble metal | Any metal that is resistant to corrosion or oxidation |