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lanthanoid

DEFINITIONS OF: lanthanoid

1

n any element of the lanthanide series (atomic numbers 57 through 71)

Synonyms:
lanthanide, lanthanon, rare earth, rare-earth element
Types:
terbium metal
a separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium
Type of:
group, grouping
any number of entities (members) considered as a unit
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