formaldehyde Syllabification: (form·al·de·hyde)Pronunciation: /fôrˈmaldəˌhīd, fər-/Definition of formaldehyde noun Chemistry a colorless pungent gas in solution made by oxidizing methanol. Alternative name: methanal; chemical formula: CH2O Origin: late 19th century: blend of formic acid and aldehydeformaldehyde in other Oxford dictionaries Definition of formaldehyde in the British & World English dictionary
