noun
- A soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite.
- synonyms: rubidium, atomic number 37
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). Rb. Retrieved September 21, 2026, from http://smartdefine.org/rb/definitions/1305622 |
| Chicago | WordNet. 2010. "Rb" http://smartdefine.org/rb/definitions/1305622 (accessed September 21, 2026). |
| Harvard | WordNet 2010, Rb, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/rb/definitions/1305622>. |
| MLA | WordNet. "Rb" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/rb/definitions/1305622> |