lanthanide series

noun Chemistry.
the series of rare-earth elements of atomic numbers 57 through 71 (lanthanum through lutetium).

Origin:
1940–45

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World English Dictionary
lanthanide series
 
n
a class of 15 chemically related elements with atomic numbers from 57 (lanthanum) to 71 (lutetium)

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Certain metal alloys of the lanthanide series showed tremendous potential for extremely high levels of magnetostriction.
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