mutual flux
radiant flux
energy flux
acoustic-energy flux
fluxmeter
fluxoid
fluorescence
fluorescence
resonance fluorescence
fluoridization
fluoride
fluorite
fluorscope
flouroscope
flute
flying-squad
phobia
focal
focus
astigmatic focus
focus of lens
sagittal focus
principal focus
vb.3 focussed
follicle
fomentation
phon
phonon
acoustic phonon
LA phonon
