phosphonic acid
noun
phos·phon·ic acid
ˌfäs-ˌfän-ik- 
: any of a series of dibasic organic acids RPO(OH)2 that are obtainable from some phosphines by oxidation
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“Phosphonic acid.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/phosphonic%20acid. Accessed 3 Nov. 2025.
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