noun🔗ShareFormaldehydThe simplest aldehyde, HCHO, a colourless gas that has many industrial applications; it dissolves in water to give formol (10%) and formalin."To preserve the biology specimens, the science teacher used a solution containing formaldehyde. "Um die biologischen Präparate zu konservieren, verwendete der Naturkundelehrer eine Lösung, die Formaldehyd enthielt.compoundsubstancechemistrymaterialscienceindustryChat with AIVocabulary GamePractice Reading