Share this entry
oxalic acid Line breaks: ox|al¦ic acid
Pronunciation: /ɒkˈsalɪk/

Definition of oxalic acid in English:


[mass noun] Chemistry
A poisonous crystalline acid with a sour taste, present in rhubarb leaves, wood sorrel, and other plants.
  • Alternative name: ethanedioic acid; chemical formula: (COOH)2
Example sentences
  • When it does so, however, it leads to the formation of highly toxic products - formic acid and oxalic acid, respectively.
  • Mix the ferric ammonium citrate and oxalic acid well, then add the silver nitrate.
  • It is an excellent source of beta-carotene, vitamins C, E and K, calcium, potassium, iron, sodium, sulphur, folic acid and oxalic acid.


Late 18th century: oxalic from French oxalique, via Latin from Greek oxalis 'wood sorrel'.

Definition of oxalic 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 adverts and access premium resources