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lanthanide series

noun, Chemistry.
1.
the series of rare-earth elements of atomic numbers 57 through 71 (lanthanum through lutetium).
Origin of lanthanide series
1940-1945
First recorded in 1940-45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for lanthanide series

lanthanide series

noun
1.
a class of 15 chemically related elements with atomic numbers from 57 (lanthanum) to 71 (lutetium)
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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