Share this entry
phosphonic acid Syllabification: phos·phon·ic ac·id
Pronunciation: /fäsˌfänik ˈasid/

Definition of phosphonic acid in English:


A crystalline acid obtained by the reaction of phosphorus trioxide with water.
  • A dibasic acid; chemical formula: HPO(OH)2
Example sentences
  • The phosphoric or phosphonic acid ester formed with the enzyme is extremely stable and is hydrolyzed very slowly.
  • A Hoffman rearrangement employing sodium hypobromite yielded the amine which was acid hydrolysed to obtain crude 2-aminoindan - 2 - phosphonic acid.
  • The abscission process was also induced in vivo by embrioctomy or 2-chloroethyl phosphonic acid treatment in fruitlets and by deblading in leaves.


Pronunciation: /ˈfäsfəˌnāt/
Example sentences
  • Phosphonates are known to be present in oligotrophic marine systems, but have not previously been considered to be bioavailable to marine diazotrophs.
  • The interactions of two antiviral, acyclic nucleoside phosphonates, adefovir and cidofovir, with xenobiotic transporters was studied in intact killifish.


Late 19th century: phosphonic from phospho- 'relating to phosphorus', on the pattern of sulfonic.

Definition of phosphonic acid in:
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Subscribe to remove ads and access premium resources