noun Physics, Chemistry.
a succession of elements initiated in the radioactive decay of a parent, as thorium or uranium, each of which decays into the next until a stable element, usually lead, is produced.
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Origin of radioactive series
First recorded in 1920–25
Also called decay series.
Definition for decay series (2 of 2)
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British Dictionary definitions for decay series
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