WordReference Random House Unabridged Dictionary of American English © 2025
phos′phorous ac′id, [Chem.]
  1. Chemistrya colorless, crystalline, water-soluble acid of phosphorus, H3PO3, from which phosphites are derived.
  • 1785–95

Collins Concise English Dictionary © HarperCollins Publishers::
phosphorous acid
  1. Also called: orthophosphorous acid a white or yellowish hygroscopic crystalline dibasic acid. Formula: H3PO3
    Systematic name: phosphoric acid
  2. any oxyacid of phosphorus containing less oxygen than the corresponding phosphoric acid
'phosphorous acid' also found in these entries (note: many are not synonyms or translations):
orthophosphorous acid - phosphite - phosphonic acid

Forum discussions with the word(s) "phosphorous acid" in the title:


Look up "phosphorous acid" at Merriam-Webster
Look up "phosphorous acid" at dictionary.com
  • Go to Preferences page and choose from different actions for taps or mouse clicks.

In other languages: Spanish | French | Italian | Portuguese | Romanian | German | Dutch | Swedish | Russian | Polish | Czech | Greek | Turkish | Chinese | Japanese | Korean | Arabic

Advertisements
Advertisements
Report an inappropriate ad.
WordReference.com
WORD OF THE DAY
GET THE DAILY EMAIL!

Become a WordReference Supporter to view the site ad-free.