noun
- A clear or yellow monobasic acid (H3PO2. ).
- synonyms: hypophosphorous acid, orthophosphorous acid
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| APA | WordNet. (2010). phosphorous acid. Retrieved September 21, 2026, from http://smartdefine.org/phosphorous_acid/definitions/1301780 |
| Chicago | WordNet. 2010. "phosphorous acid" http://smartdefine.org/phosphorous_acid/definitions/1301780 (accessed September 21, 2026). |
| Harvard | WordNet 2010, phosphorous acid, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/phosphorous_acid/definitions/1301780>. |
| MLA | WordNet. "phosphorous acid" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/phosphorous_acid/definitions/1301780> |