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	radioactinium [ rey-dee-oh-ak-tin-ee-uhm ] / ˌreɪ di oʊ ækˈtɪn i əm / noun Chemistry. the radioactive isotope of thorium having a mass number 227 and a half-life of 18.8 days. Symbol: RdAc, Th 227 Origin of radioactinium First recorded in 1905–10; radio- + actinium Words nearby radioactinium Radiguet, radii, Radin, radio, radioacoustics, radioactinium, radioactivate, radioactive, radioactive constant, radioactive dating, radioactive decay Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020
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radioactinium