Any of the abundant metallic elements of atomic number 57 through 71.
Any of a series of 15 naturally occurring metallic elements. The lanthanides include elements having atomic numbers 57 (lanthanum) through 71 (lutetium). 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.
any element of the lanthanide series (atomic numbers 57 through 71)
Find another word for rare-earth. In this page you can discover 4 synonyms, antonyms, idiomatic expressions, and related words for rare-earth, like: rare-earth-element, lanthanoid, lanthanide and lanthanon.