noun
- A trivalent metallic element of the rare earth group; occurs with yttrium.
- synonyms: Er, atomic number 68
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). Erbium. Retrieved September 20, 2026, from http://smartdefine.org/erbium/definitions/1247633 |
| Chicago | WordNet. 2010. "Erbium" http://smartdefine.org/erbium/definitions/1247633 (accessed September 20, 2026). |
| Harvard | WordNet 2010, Erbium, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/erbium/definitions/1247633>. |
| MLA | WordNet. "Erbium" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/erbium/definitions/1247633> |