| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |
|---|---|
| FRCD | Fellow of the Royal College of Dentists; fixed ratio combination drug |
| FTIR | Fourier-transformed infrared; functional terminal innervation ratio |
| G/A | globulin/albumin [ratio] |
| G/E | granulocyte/erythroid [ratio] |