About
镭 (léi) was coined for the element radium as part of the systematic Chinese translation of the periodic table. Simplified from 鐳, it is a phonosemantic compound: the radical 钅 (metal, simplified from 釒) indicates the metallic nature, while 雷 (léi, 'thunder') acts as a phonetic component approximating the first syllable of the Latin 'radium'. It has no classical usage, appearing only in modern scientific, chemical, and industrial contexts to denote the highly radioactive alkaline earth metal.
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