noun
- The number that is represented as a one followed by 18 zeros. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). quintillion. Retrieved September 20, 2026, from http://smartdefine.org/quintillion/definitions/1244470 |
| Chicago | WordNet. 2010. "quintillion" http://smartdefine.org/quintillion/definitions/1244470 (accessed September 20, 2026). |
| Harvard | WordNet 2010, quintillion, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/quintillion/definitions/1244470>. |
| MLA | WordNet. "quintillion" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/quintillion/definitions/1244470> |