| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
|---|---|
| K-F Ring | Kayser-Fleischer Ring |
| ERFS | electrophysiological ring finger splinting |
| FC | fasciculus cuneatus; fast component [of a neuron]; febrile convulsions; feline conjunctivitis; ferri... |
| FTF | finger to finger |