| EFP | early follicular phase; effective filtration pressure; endoneural fluid pressure |
|---|---|
| EFR | effective filtration rate |
| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
| filt | filter, filtration |
| FL | fatty liver; feline leukemia; femur length; fibers of Luschka; fibroblast-like; filtration leukapher... |