Found 2 items, similar to lanthanon.
English → English (WordNet) Definition: lanthanon lanthanon n : any element of the lanthanide series (atomic numbers 57 through 71) [syn: rare earth, rare-earth element, lanthanoid, lanthanide]
English → English (gcide) Definition: lanthanon lanthanon \lanthanon\ n. Same as lanthanide. Syn: rare earth, rare-earth element, lanthanide. [WordNet 1.5]