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n. See rare-earth element.

n. Any of the 14 rare earth elements from cerium (or from lanthanum) to lutetium in the periodic table; because their outermost orbitals are empty, they have very similar chemistry; below them are the actinides.

n. Any rare earth element of the lanthanide series (atomic numbers 57 through 71).

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

"If you remember the Periodic Table of Elements from your high school chemistry class, rare earth refers to a group of 17 elements, also called lanthanide elements, with similar metallic characteristics, but differing from other metals."

grouping    group   

terbium metal   

rare earth    rare-earth element    lanthanon    lanthanoid   

bromonium    multicomponent    diapson    norbornyl    europium