| 甲醛 | jia3 quan2 | formaldehyde (HCHO) |
| 海德 | hai3 de2 | Hyde (surname) |
| 乙醛 | yi3 quan2 | ethanal |
| 酚醛 | fen1 quan2 | phenolic aldehyde |
| 迟钝的 | chi2 dun4 de5 | dopy |
| 丙糖 | bing3 tang2 | triose (CH20)3, monosaccharide with three carbon atoms, such as glyceraldehyde 甘油醛[gan1 you2 quan2] |
| 醛糖 | quan2 tang2 | aldose, monosaccharide containing aldehyde group -COH |
| 丙醛 | bing3 quan2 | propionaldehyde |
| 乙叉 | yi3 cha1 | ethydene |
| 酮醛 | tong2 quan2 | ketoaldehyde |
| 厚皮 | hou4 pi2 | pachyderma |
| 醛 | quan2 | aldehyde |
| 丁醛 | ding1 quan2 | butanal |