| ff- | fertility inhibition negative |
|---|---|
| FFIT | fluorescent focus inhibition test |
| FIF | feedback inhibition factor; fibroblast interferon; forced inspiratory flow; formaldehyde-induced flu... |
| GBIA | Guthrie bacterial inhibition assay |
| GI | gastrointestinal; gelatin infusion [medium]; gingival index; globin insulin; glomerular index; gluco... |