| Abbreviation | Definition |
|---|---|
| FCS | Flow Cytometry Standard |
| FCVMLT | Federal College of Veterinary and Medical Laboratory Technology |
| FDA | Fluorescein Diacetate A |
| FDI | Federal Drug Investigations |
| FDLB | Food and Drug Laboratory Branch |
| FDP | Fibrin Degradation Product |
| FDRL | Food Decisions Research Laboratory |
| FE | Iron |
| FED | Figure Eight Distribution |
| FED | Fractional Effective Dose |
| FEEL | Field Extension Education Laboratory |
| FEL | Fedora Electronic Laboratory |
| FELC | Fuel Ethanol Laboratory Conference |
| FELL | Free Electron Laser Laboratory |
| FELTP | Field Epidemiology Laboratory Training Program |
| FEM | Femoral |
| FENa | Fraction Excreted Sodium |
| FERET | Facial Evaluation REcognition Test |
| FFA | Free Fatty Acid |
| FFAR | Free Fatty Acid Receptor |