| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
|---|---|
| FFC | fixed flexion contracture; fluorescence flow cytometry; free from chlorine |
| FFF | degree of fineness of abrasive particles; field-flow fractionation; flicker fusion frequency |
| FGF | father's grandfather; fibroblast growth factor; fresh gas flow |
| FIF | feedback inhibition factor; fibroblast interferon; forced inspiratory flow; formaldehyde-induced flu... |