| Subject | English | French |
| tech., mater.sc. | acetylene-nitrous oxide | monoxyde de diazote-acétylène |
| chem., el. | cathodic reduction of nitric to nitrous acid | la réduction cathodique de l'acide nitrique à l'état d'acide nitreux |
| med.appl. | ether-oxygen-nitrous oxyde mixture | mélange d'éther-oxygène-gaz hilarant |
| environ. | nitric acid and nitrous acid | acide nitrique et acide nitreux |
| chem. | nitrous acid | acide nitreux |
| chem. | nitrous acid | acidum nitrosum |
| tech. | nitrous acid | acide nitreux (HNO₂) |
| environ., chem. | nitrous dimethylamide | diméthylnitrosamine |
| chem. | nitrous ester | ester nitreux |
| chem. | nitrous ether | éther nitreux |
| chem. | nitrous ether | nitrite d'éthyle |
| chem. | nitrous fume | vapeur nitreuse |
| tech., mater.sc. | nitrous fume | fumée nitreuse |
| chem. | nitrous gas | gaz nitreux |
| chem. | nitrous gases | gaz nitreux |
| chem. | nitrous oxide | oxydes d'azote |
| chem. | nitrous oxide | peroxyde d'azote |
| chem. | nitrous oxide | anhydride azotique |
| UN, chem. | nitrous oxide | monoxyde de diazote |
| UN, chem. | nitrous oxide | oxyde de diazote |
| EU. | nitrous oxide | anhydride hypoazoteux |
| UN, chem. | nitrous oxide | oxyde nitreux (N2O) |
| food.ind. | nitrous oxide | oxide nitreux |
| food.ind. | nitrous oxide | gaz hilarent |
| UN, chem. | nitrous oxide | oxyde d'azote |
| environ. | nitrous oxide | protoxyde d'azote |
| environ., food.ind., chem. | nitrous oxide | gaz hilarant |
| chem. | nitrous oxide | pentoxyde d'azote |
| chem. | nitrous oxide | trioxyde d'azote |
| chem. | nitrous oxide | oxyde nitrique |
| chem. | nitrous oxide | protoxyde d’azote |
| gen. | nitrous oxide | oxyde nitreux |
| gen. | nitrous oxide | E 942 |
| tech. | nitrous oxide | oxyde azoteux (N₂O) |
| gen. | nitrous oxide | hémioxyde d'azote |
| gen. | nitrous oxide | oxyde azoteux |
| met. | nitrous oxide acetylene flame | flamme protoxyde d'azote acétylène |
| med.appl. | nitrous oxide anesthesia | narcose à gaz hilarant |
| med. | nitrous oxide anesthesia | anesthésie au protoxyde d'azote |
| med.appl. | nitrous oxide anesthesia apparatus | appareil de narcose à gaz hilarant |
| med.appl. | nitrous oxide gas | gaz hilarant |
| chem. | nitrous oxides | oxydes nitreux |
| chem. | nitrous oxides | oxydes azoteux |
| gen. | nitrous vapours | vapeurs nitreuses |
| chem. | nitrous vitriol | acide nitrosylsulfurique |
| chem. | nitrous vitriol | nitrose |
| environ. | winter concentration of nitrous acid | concentration hivernale d'acide nitreux |