- focus sentence
- focus servo
- Focus Today
- focus-type singular point
- focus variation method
- FODA
- fodder crop cultivation
- fodder substitution for grain
- Fodor's lemma
- Fodu Dao
- foehn
- foetid yew
- fog
- fog and thick haze
- Fogang Xian
- fog damage
- fog density
- fog droplet size spectrometer
- fog filter
- fogged
- Foggia
- fogging
- fogging value
- Foggy Chongqing
- fog-like