| FRMedSoc | Fellow of the Royal Medical Society |
|---|---|
| FRMS | Fellow of the Royal Microscopical Society |
| FRS | Fellow of the Royal Society; ferredoxin-reducing substance; first rank symptom; furosemide |
| FRSH | Fellow of the Royal Society of Health |
| FSR | Fellow of the Society of Radiographers; film screen radiography; force sensing resistor; fragmented ... |