noun🔗ShareAcetaldehyd, EthanalAn organic compound, (CH3CHO). Sometimes called ethanal or acetic aldehyde. See aldehyde."The off-flavor in the old apple cider likely resulted from the presence of acetaldehyde, a byproduct of fermentation. "Der Fehlgeschmack in dem alten Apfelwein resultierte wahrscheinlich aus dem Vorhandensein von Acetaldehyd, einem Nebenprodukt der Gärung.compoundsubstancechemistrybiochemistryChat with AIVocabulary GamePractice Reading