'lanthanide' definitions:
Definition of 'lanthanide'
(from WordNet)
noun
Any element of the lanthanide series (atomic numbers 57 through 71) [syn: rare earth, rare-earth element, lanthanoid, lanthanide, lanthanon]
Definition of 'lanthanide'
From: GCIDE
- lanthanide \lanthanide\ n. Any rare earth element of the lanthanide series (atomic numbers 57 through 71).
- Syn: rare earth, rare-earth element, lanthanon. [WordNet 1.5]