| ft. | foot, feet |
|---|---|
| 1 inch | = 1/12 feet, 2.54 cm; |
| BF | bentonite flocculation; bile flow; black female; blastogenic factor; blister fluid; blood flow; body... |
| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
| FOB | fecal occult blood; feet out of bed; fiberoptic bronchoscopy; foot of bed; functional observational ... |