| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |
|---|---|
| AF | abnormal frequency; acid-fast; adult female; afebrile; aflatoxin; albumin-free; albumose-free; aldeh... |
| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
| ICF | immunodeficiency-centromeric instability-facial anomalies [syndrome]; indirect centrifugal flotation... |
| IFV | interstitial fluid volume; intracellular fluid volume |