rare-earth_element (HyperDic hyper-dictionary)

English > 1 sense of the expression *rare-earth element*:
NOUN	substance	rare-earth element, rare earth, lanthanoid, lanthanide, lanthanon	any element of the lanthanide series (atomic numbers 57 through 71)

English > *rare-earth element*: 1 sense > noun 1, substance
Meaning	Any element of the lanthanide series (atomic numbers 57 through 71).
Synonyms	rare earth, lanthanoid, lanthanide, lanthanon
Narrower	terbium metal	A separate group of related lanthanides, including terbium, europium, gadolinium, and sometimes dysprosium
Broader	group, grouping	Any number of entities (members) considered as a unit
Spanish	lantánido, tierras raras
Catalan	lantànid, terres rares

HyperDic: rare-earth_element