英语词汇“radioactinium”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	radioactinium
释义	ra·dio·actinium \“+\ noun Etymology: New Latin, from radio- + actinium : the radioactive isotope of thorium of mass number 227 formed by disintegration of actinium — symbol RdAc or Th²²⁷; see actinium series
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