Definition of formic acid in English:

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formic acid

Pronunciation: /ˌfôrmik ˈasəd/


A colorless irritant volatile acid made catalytically from carbon monoxide and steam. It is present in the fluid emitted by some ants.
  • Alternative name: methanoic acid; chemical formula: HCOOH.
Example sentences
  • Some of these compounds are already known to be dangerous to human health when ingested, such as formaldehyde, octane, formic acid, butane, methyl propane, and benzene.
  • When it does so, however, it leads to the formation of highly toxic products - formic acid and oxalic acid, respectively.
  • Carbon dioxide is formed when formic acid is dehydrogenated.


Late 18th century: formic from Latin formica 'ant'.

For editors and proofreaders

Syllabification: for·mic ac·id

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