'lanthanon' definitions:

Definition of 'lanthanon'

(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 'lanthanon'

From: GCIDE

lanthanon \lanthanon\ n. Same as lanthanide.
Syn: rare earth, rare-earth element, lanthanide. [WordNet 1.5]

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