: of, relating to, or containing phosphorus especially with a valence higher than in phosphorous compounds

Word History

First Known Use

circa 1765, in the meaning defined above

Time Traveler
The first known use of phosphoric was circa 1765

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Cite this Entry

“Phosphoric.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phosphoric. Accessed 8 Jul. 2026.

Medical Definition

: of, relating to, or containing phosphorus especially with a valence higher than in phosphorous compounds
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