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actinide series

noun, Chemistry
the series of radioactive elements that starts with actinium and ends with lawrencium.
Origin of actinide series
1940-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for actinide series
  • The actinide series derives its name from the first element in the series, actinium.
  • Systematic view of optical absorption spectra in the actinide series loading.
British Dictionary definitions for actinide series

actinide series

a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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