lanthanide

• POS: Noun
• HYPHEN: lan=tha=nide

CIDE DICTIONARY

lanthanide, n. 

 Any rare earth element of the lanthanide series (atomic numbers 57 through 71).  [WordNet 1.5]

OXFORD DICTIONARY

lanthanide, n. Chem. an element of the lanthanide series.

Idiom

lanthanide series a series of 15 metallic elements from lanthanum to lutetium in the periodic table, having similar chemical properties: also called rare earths (see RARE(1)).

Etymology

G Lanthanid (as LANTHANUM)