noun
- A very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas. ).
- synonyms: He, atomic number 2
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). helium. Retrieved September 21, 2026, from http://smartdefine.org/helium/definitions/1247644 |
| Chicago | WordNet. 2010. "helium" http://smartdefine.org/helium/definitions/1247644 (accessed September 21, 2026). |
| Harvard | WordNet 2010, helium, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/helium/definitions/1247644>. |
| MLA | WordNet. "helium" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/helium/definitions/1247644> |