lanthanide(redirected from Lanthanoids)
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Related to Lanthanoids: Actinides
Any of a series of chemically similar metallic elements with atomic numbers ranging from 57 (lanthanum) through 71 (lutetium). The lanthanides, together with yttrium and scandium, constitute the rare-earth elements. Also called lanthanoid.
(Elements & Compounds) any element of the lanthanide series. Also called: rare earth or rare-earth element
[C19: from lanthanum + -ide]
lan•tha•nide(ˈlæn θəˌnaɪd, -nɪd)
any element of a series of rare-earth elements of atomic numbers 57 through 71.
Any of a series of 15 naturally occurring metallic elements. The lanthanides include elements having atomic numbers 57 through 71. They are grouped apart from the rest of the elements in the Periodic Table because they all behave in a similar way in chemical reactions. Also called rare-earth element. See Periodic Table.
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|Noun||1.||lanthanide - any element of the lanthanide series (atomic numbers 57 through 71)|
terbium metal - a separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium