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phosphorous acid
noun
: a deliquescent crystalline acid H3PO3 used especially as a reducing agent and in making phosphites
Examples of phosphorous acid in a Sentence
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Sodium hydroxide and phosphorous acid are used to remove gums and other undesirable compounds in oil, according to Dansby.
—Sudiksha Kochi, USA TODAY, 21 Mar. 2022
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Word History
First Known Use
1788, in the meaning defined above
Dictionary Entries Near phosphorous acid
Cite this Entry
“Phosphorous acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phosphorous%20acid. Accessed 16 Dec. 2024.
Medical Definition
phosphorous acid
noun
: a deliquescent crystalline acid H3PO3 used especially as a reducing agent and in making phosphites
More from Merriam-Webster on phosphorous acid
Britannica.com: Encyclopedia article about phosphorous acid
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