| Fc | centroid frequency; fraction/centrifuge; fragment, crystallizable [of immunoglobulin] |
|---|---|
| FNF | false-negative fraction; femoral neck fracture |
| FPF | false positive fraction; fibroblast pneumocyte factor |
| Fr1 | first fraction |
| HPF | heparin-precipitable fraction; hepatic plasma flow; high-pass filter; high-power field [microscope];... |