(frequently in plural) any of a group of similar metallic elements of the transition series often associated in ores, comprising platinum, iridium…
| 单词 | θ216517 |
| 释义 | society > occupation and work > materials > derived or manufactured material > metal > base metal > [noun] > metals of platinum group (6) platinum metal1842 (frequently in plural) any of a group of similar metallic elements of the transition series often associated in ores, comprising platinum, iridium… platinoid1881 Chemistry. A platinum metal. Usually in plural. Subcategories:— specific (4) |
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