Any of a class of highly reactive organic chemical compounds obtained by oxidation of primary alcohols, characterized by the common group CHO, and used in the manufacture of resins, dyes, and organic acids.

• 醛，乙醛由醇类有机物氧化还原而来的一类高活性有机化合物，其特征是都含有cho基团，用于制造合成树脂、染料和有机酸