noun
- Any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). halogen. Retrieved September 20, 2026, from http://smartdefine.org/halogen/definitions/1248808 |
| Chicago | WordNet. 2010. "halogen" http://smartdefine.org/halogen/definitions/1248808 (accessed September 20, 2026). |
| Harvard | WordNet 2010, halogen, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/halogen/definitions/1248808>. |
| MLA | WordNet. "halogen" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/halogen/definitions/1248808> |