| FELC | Friend erythroleukaemia cells |
|---|---|
| FELi | Fractional excretion of lithium |
| FeLV | Feline Leukaemia Virus |
| FEM | Finite Element Method |
| FEM | finite element model |
| FEM | Finite element modeling |
| FEN | D,L-fenfluramine |
| FEN | Fenoterol |
| FEN-1 | Flap endonuclease 1 |
| FEP | Flash evoked potential |