 |
| English | French |
| factor four | facteur 4 |
| Factor Four | facteur 4 |
| four stroke engine An internal combustion engine whose cycle is completed in four piston strokes; includes a suction stroke, compression stroke, expansion stroke, and exhaust stroke | moteur à quatre temps |
| four-toothed whales | balaines noires (Berardius spp.) |
| four-year development programme 1994-1997 relating to the environmental component of Community statistics | programme de développement quadriennal 1994-1997 relatif à la composante environnementale des statistiques communautaires |