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Definition of LANTHANIDE
: any of the series of elements with increasing atomic numbers that begins with lanthanum or cerium and ends with lutetium — see periodic table table
Variants of LANTHANIDE
lan·tha·nide also lan·tha·noid\-ˌnȯid\
Origin of LANTHANIDE
International Scientific Vocabulary
First Known Use: 1926
Medical Definition of LANTHANIDE
: any in a series of elements of increasing atomic numbers beginning with lanthanum (57) or cerium (58) and ending with lutetium (71)
Any of the series of 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57–71). With scandium and yttrium, they make up the rare earth metals. Their atoms have similar configurations and similar physical and chemical behaviour; the most common valences are 3 and 4.