(a.) Of or pertaining to phosphorus; resembling or containing phosphorus; specifically, designating those compounds in which phosphorus has a lower valence as contrasted with phosphoric compounds; as, phosphorous acid, H3PO3.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). phosphorous. Retrieved September 21, 2026, from http://smartdefine.org/phosphorous/definitions/2044920 |
| Chicago | Webster's. 2011. "phosphorous" http://smartdefine.org/phosphorous/definitions/2044920 (accessed September 21, 2026). |
| Harvard | Webster's 2011, phosphorous, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/phosphorous/definitions/2044920>. |
| MLA | Webster's. "phosphorous" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/phosphorous/definitions/2044920> |