- fluid mechanics
- fluorescence
- fluorescent
- flux quantum
- fluxoid
- focal
- foci
- focusing ring
- folding tripod
- follower
- formant
- fortin barometer
- forward voltage
- foundation vibration
- four-vector
- fractionation column
- fracture mechanics
- frame
- frame counter
- Fraunhofer diffraction
- Fraunhofer lines
- free heat
- freedom
- frequency interval
- frequency method
- friction band
- friction heat
- friction resistance
- fringe separation
- front frame
- frontal resistance
- fuel channel
- fuel cooling
- fuel economy
- fuel rates
- fuel rod
- freewheel mechanism
- Fresnel mirrors
- fuel assembly
- fuel cladding
- fuel regeneration
- full band
- friction tape
- frictional resistance
- fringe
- front element
- fuel inventory
- fundamental tone
- funnel stand
- fuzzy image
- Galilean frame
- galvanography
- galvanometer
- frequence
- frequency control
- fresh uranium
- Fresnel diffraction
- frictional heat
- fuel charge
- fuel density
- fume cupboard
- fusible
- G string
- gamma quantum
- gamma rays
- gas baffle
- fundamental force
- fundamental particle
- g-factor
- galactic halo
- Galilean
- gamma heating
- gamma-counter
- gamma-emitter
- gas boiler
- gas enrichment
- gas grid
- function
- fundamental concord
- gadget bag
- gage invariance
- galilean telescope
- galvanism
- gamma shield
- gas content
- gas detector
- gas equation
- gas heating
- gas leak
- gasoline
- gate gear
- gauge invariance
- gauss
- gear cutting
- gear shift
- gas main
- gas mantle
- gas nitriding
- gas oil
- gas pedal