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

Recent Examples on the Web
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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

Word History

First Known Use

1788, in the meaning defined above

Time Traveler
The first known use of phosphorous acid was in 1788

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 28 Nov. 2024.

Medical Definition

phosphorous acid

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

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