甲醛 jiǎquán formaldehyde Definitions Defs Origin Strokes Stroke Words Sentences Sents 聚甲醛 jùjiǎquán polyformaldehyde polyformaldehyde (CH2O)n苯甲醛 běnjiǎquán benzaldehyde benzaldehyde C6H5CHO, the simplest aromatic aldehyde