Definition of formaldehyde in English:

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formaldehyde

Pronunciation: /fôrˈmaldihīd/ /fərmˈaldəˌhīd/

noun

Chemistry
A colorless pungent gas in solution made by oxidizing methanol.
  • Alternative name: methanal; chemical formula: CH2O.
Example sentences
  • Set on fire, these items release formaldehyde, polyvinyl chloride, and dioxins.
  • They are produced by the polymerization reaction of phenol and formaldehyde.
  • Bleach, ethyl alcohol, and formaldehyde can kill the virus in the environment.

Origin

Late 19th century: blend of formic acid and aldehyde.

For editors and proofreaders

Syllabification: form·al·de·hyde

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