单词	actinide
释义	actinide noun ac·​ti·​nide ˈak-tə-ˌnīd  : any of the series of elements with increasing atomic numbers that begins with actinium or thorium and ends with lawrencium see Periodic Table Example Sentences Recent Examples on the Web After 200 years, the decay heat of HLW would be reduced by a factor of up to 30 in all minor actinide-burning schemes as compared to the reference PWR once- through scheme. James Conca, Forbes, 27 Apr. 2021 Meant for studying actinides, the ROBL allows scientists to analyze the metals with an extremely close eye through spectroscopy. David Grossman, Popular Mechanics, 22 Oct. 2019 To form their artificial actinides, the team wanted to make precursors. David Grossman, Popular Mechanics, 22 Oct. 2019 Uranium is currently the actinide of choice for the industry, used (sometimes with a little plutonium) in 100 percent of the world’s commercial reactors. Richard Martin, WIRED, 21 Dec. 2009 Word History Etymology acti(nium) + (lantha)nide First Known Use 1945, in the meaning defined above
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