(n.) A very heavy, inert gaseous element occurring in the atmosphere in the proportion of one volume is about 20 millions. It was discovered by Ramsay and Travers in 1898. It can be condensed to a liquid boiling at -109ยก C., and to a solid which volatilizes without melting. Symbol Xe or X; atomic weight 130.2.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). xenon. Retrieved September 22, 2026, from http://smartdefine.org/xenon/definitions/2082913 |
| Chicago | Webster's. 2011. "xenon" http://smartdefine.org/xenon/definitions/2082913 (accessed September 22, 2026). |
| Harvard | Webster's 2011, xenon, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/xenon/definitions/2082913>. |
| MLA | Webster's. "xenon" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/xenon/definitions/2082913> |