| bf | black female; bouillon filtrate [tuberculin] |
|---|---|
| B/F | black female; bound/free [antigen ratio] |
| CF | calcaneal fibular [ligament]; calcium leucovorin; calf blood flow; calibration factor; cancer-free; ... |
| FDE | female day-equivalent; final drug evaluation |
| Fe | female; ferret; iron [Lat. ferrum] |