| freshness | Frische |
| freshness of spring water | Quellfrische |
| freshwater | Süßwasser- |
| Freshwater angelfish | Skalare |
| freshwater aquaria | Süsswasseraquarien |
| freshwater aquarium | Süsswasseraquarium |
| freshwater bream | Brachse |
| freshwater breams | Brassen |
| Freshwater butterflyfish | Schmetterlingsfisch |
| Freshwater catfish | Echte Welse |
| freshwater crab | Süßwasserkrebs |
| Freshwater Crocodile | Australien-Krokodil |
| freshwater degradation | Süßwasserdegradation |
| freshwater ecosystem | Süßwasserökosystem |
| freshwater eel | Flussaal |
| freshwater eels | echte Aale |
| freshwater factories | Süßwassergewinnungsanlagen |
| freshwater factory | Süßwassergewinnungsanlage |
| freshwater fish | Süßwasserfisch |
| freshwater fishery | Binnenfischerei |
| freshwater fishes | Süßwasserfische |
| freshwater fishing | Binnenfischerei |
| freshwater habitat | Süsswasserbiotop |
| Freshwater hatchetfish | Beilbauchsalmler |
| freshwater lake | Süßwassersee |
| freshwater lakes | Süßwasserseen |
| freshwater lamprey | Flussneunauge |
| freshwater ling | Aalquappe |
| freshwater mussel | Süßwassermuschel |
| freshwater mussels | Süßwassermuscheln |
| freshwater nerite | Fluss-Schwimmschnecke |
| freshwater organism | Süßwasserorganismen |
| freshwater pearl | Süßwasserperle |
| freshwater pollution | Süßwasserverschmutzung |
| freshwater resource | Süßwasserressourcen |
| freshwater science | Limnologie |
| freshwater sculpins | Groppen |
| freshwater shrimps | Flohkrebse |
| freshwater smelts | Stinte |
| freshwater stingray | Süßwasserrochen |
| freshwater tank | Süßwasserbehälter |
| freshwater whaler | Bullenhai |
| freshwaterfish | Süßwasserfisch |
| Fresne | Fresnes |
| Fresnel approximation | Fresnel-Näherung |
| Fresnel diffraction | Fresnelsche Beugung |
| Fresnel ellipsoid | Fresnelellipsoid |
| Fresnel equations | Fresnelsche Formeln |
| Fresnel integral | Klothoide |
| Fresnel lens | Stufenlinse |
| Fresnel lens antenna | Fresnel-Linsen-Antennen |
| Fresnel lens system | Fresnel-Linsensystem |
| Fresnel loss | Fresnelverluste |
| Fresnel mirror | Fresnel'scher Spiegel |
| Fresnel reflector | Fresnel'scher Reflektor |
| Fresnel region | Fresnelzone |
| Fresnel spot | Fresnellinsen-Scheinwerfer |
| Fresnel spotlight | Fresnellinsen-Scheinwerfer |
| Fresnel zone | Fresnelzone |
| Fresnes-sur-Escault | Fresnes-sur-Escault |
| Fresno | Fresno |
| Fresno County | Fresno County |
| fret | Bund |
| fret and fume | Ungeduld oder Angespanntheit zeigen |
| fret hand | Greifhand |
| fret over | besorgt sein um |
| fret saw | Laubsäge |
| fret sb. | jdm. Sorgen machen |
| fretful | unruhig |
