freq - gene
- frequency characters of flow
- frequency class
- frequency curve
- frequency estimate
- frequency estimation
- frequency evaluation
- frequency index
- frequency of departures
- frequency-abundance index
- fresh
- fresh air
- fresh air fan
- fresh groundwater aquifer
- fresh raw material
- fresh sewage
- fresh sludge
- fresh wastewater
- fresh water aquifer
- fresh water biome
- fresh water biosphere
- Fresh Water Institute
- fresh water pond
- fresh water supply
- fresh water use
- fresh weight
- fresh-air flue
- fresh-air inlet
- fresh-air intake
- fresh-salt water interface
- fresh-water marsh
- fresh-water plancton
- fresh-water plankton
- freshet
- freshwater
- freshwater acidification
- freshwater algae
- freshwater and marine aquaculture
- Freshwater Biological Association
- freshwater biological resources
- freshwater biome
