| FGF | father's grandfather; fibroblast growth factor; fresh gas flow |
|---|---|
| FIF | feedback inhibition factor; fibroblast interferon; forced inspiratory flow; formaldehyde-induced flu... |
| FIF50 | forced inspiratory flow at 50% of forced vital capacity |
| FIFR | fasting intestinal flow rate |
| fl | femtoliter; filtered load; flexion, flexible; fluorescent; flow; fluid; flutter; foot lambert |