| 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] |
| GN | gaze nystagmus; glomerulonephritis; glucose nitrogen [ratio]; gnotobiote; graduate nurse; gram-negat... |