| RDHBF | regional distribution of hepatic blood flow |
|---|---|
| RDW | red blood cell distribution width index |
| SDF | slow death factor; stress distribution factor |
| SFD | silo filler's disease; skin-film distance; small for dates; spectral frequency distribution |
| VD | vapor density; vascular disease; vasodilation, vasodilator; venereal disease; venous dilatation; ven... |