phosphorous acid

noun

Definition of phosphorous acid

: a deliquescent crystalline acid H3PO3 used especially as a reducing agent and in making phosphites

First Known Use of phosphorous acid

1788, in the meaning defined above

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The first known use of phosphorous acid was in 1788

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Cite this Entry

“Phosphorous acid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phosphorous%20acid. Accessed 27 Nov. 2020.

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More Definitions for phosphorous acid

phosphorous acid

noun

Medical Definition of phosphorous acid

: 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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