(n.) Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Butylene. Retrieved September 25, 2026, from http://smartdefine.org/butylene/definitions/1983448 |
| Chicago | Webster's. 2011. "Butylene" http://smartdefine.org/butylene/definitions/1983448 (accessed September 25, 2026). |
| Harvard | Webster's 2011, Butylene, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/butylene/definitions/1983448>. |
| MLA | Webster's. "Butylene" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/butylene/definitions/1983448> |