| Abbreviation | Definition |
|---|---|
| FSAQ | Four Systems Anxiety Questionnaire |
| FSBS | Fasting Blood Sugar |
| FSCL | Fuel Synthesis and Catalysis Laboratory |
| FSG | Fasting Serum Glucose |
| FSH | Follicle-Stimulating Hormone |
| FSI | First Subject In |
| FSL | Formal Systems Laboratory |
| FSPS | Fibrin split products |
| FT | Free Testosterone |
| FT | Free Thyroxine |
| FTA | Fluorescent Treponemal Antibody |
| FTAABS | Fluorescent treponemal antibody absorbed |
| FTA-ABS | Fluorescent treponemal antibody absorbed |
| FTA-ABS | Fluorescent Treponemal Antibody ABSorption test |
| FTDL | Fresh Tissue Dissection Laboratory |
| FTDTL | Forensic Toxicology Drug Testing Laboratories |
| FTDTL | Forensic Toxicology Drug Testing Laboratory |
| FTFL | Formate-TetrahydroFolate Ligase |
| FTI | Free thyroxine index |
| FTS | First Trimester Screening |