| Abbreviation | Definition |
|---|---|
| FNL | Frederick National Laboratory |
| FOBL | Friends of Berkeley Lab (Lawrence Berkeley National Laboratory community newsletter; Berkeley, CA) |
| FOBT | fecal occult blood test(s)(ing) |
| FOG | fast-oxidative-glycolytic [fiber] |
| FOG | Flare Out Growth |
| FOIL | Federal Outdoor Impact Laboratory |
| FOML | Functional Organic Materials Laboratory |
| FONSI | finding of no significant impact |
| FOSL | Friends of Stone Laboratory |
| FOTB | Fecal Occult Blood Test |
| FP | Fat Potential |
| FPRL | Fluid Power Research Laboratory |
| FPSL | Food Products and Safety Laboratory |
| FRAP | Ferric Reducing Ability of Plasma |
| FRDL | Family Relationships and Development Laboratory |
| FRL | Family Research Laboratory |
| FRL | Field Robotics Laboratory |
| FRSL | Food Research and Standardization Laboratory |
| FRSL | Forestry Remote Sensing Laboratory |
| FSAQ | Fallowfield's Sexual Activity Questionnaire |