| Term | Definition / Meaning / Stand for |
| FCHO |
F-BAR Domain Containing |
| FBXW |
F-Box and WD Repeat Domain Containing |
| FXYD |
FXYD Domain-Containing Ion Transport Regulator |
| FUBP1 |
Far Upstream Element-Binding Protein 1 |
| FasL |
Fas Ligand |
| FTO |
Fat Mass and Obesity-Associated Protein |
| FAPB |
Fatty Acid-Binding Protein |
| FA |
Fatty Acid |
| FcR |
Fc Receptor |
| FOB |
Fecal Occult Blood |
| FGR |
Feline Growth Retardation Gene |
| FIB |
Fibrinogen |
| FRS |
Fibroblast Growth Factor Receptor Substrate |
| FRP |
Fibroblast Reticular Cell Protein |
| FLS |
Fibroblast-Like Synoviocyte |
| FSP |
Fibroblast-Specific Protein |
| FSD |
Fibromuscular Dysplasia |
| FN |
Fibronectin |
| FLNA |
Filamin A |
| FLNB |
Filamin B |
| FTY |
Fingolimod |
| F1 |
First Filial Generation |
| FST |
Fixation Index |
| FLA |
Flagellin |
| FEN1 |
Flap Endonuclease 1 |
| FVA |
Flavin Adenine Dinucleotide Hydrolase |
| FMN |
Flavin Mononucleotide |
| FLK |
Flt-Related Kinase |
| FAM |
Fluorescein Amidite |
| FPA |
Fluorescent Polarization Assay |
| FO |
Fluoride-Optic |
| FLT |
Fms-Like Tyrosine Kinase |
| FC |
Fold Change |
| FAC |
Folinic Acid, 5-Fluorouracil, and Cytarabine |
| FS |
Follicle-Stimulating Hormone |
| FL |
Follicular Lymphoma |
| FAA |
Formalin-Acetic Acid-Alcohol |
| FWD |
Forward Primer |
| FSC |
Forward Scatter |
| FOS |
Fos Proto-Oncogene |
| FPKM |
Fragments Per Kilobase of Transcript per Million |
| FAB |
French-American-British Classification |
| FRDA |
Friedreich's Ataxia |
| FOG |
Friend of GATA |
| FBP1 |
Fructose-1,6-Bisphosphatase 1 |
| FBP |
Fructose-1,6-Bisphosphate |
| FAF |
Fundus Autofluorescence |
| FARM |
Fungal Adhering and Remodeling Motif |
| FUS |
Fused in Sarcoma |
| FLAG |
Fusion Peptide Tag |
| FYN |
Fyn Proto-Oncogene |
| F2 |
Second Filial Generation |
| FUS1 |
Tumor Suppressor FUS1 |
| FESP |
18F-fluoro-ethyl-spiperone |
| FPCA |
3-fluropyridine-4-carboxylic Acid |
| FAL |
3-fucosyl-N-acetyl-lactosamine |
| FNZ |
3H-flunitrazepam |
| FONS |
4-fluoro 4-nitrostilbene |
| FIPI |
5-fluoro-2-indolyl Des-chlorohalopemide |
| Fuc |
Alpha-L-fucosyl |
| FruA |
D-fructose-1,6-bisphosphate Aldolase |
| FLAT |
F-wave Latency |
| FIPI |
Fabry International Prognostic Index |
| FGDY |
faciogenital dysplasia |
| FIMs |
Factor-I Like Modules |
| FIPK |
Factor-Independent Protein Kinase |
| FV |
Factor V |
| FX |
Factor X |
| FXII |
Factor XII |
| FGF |
factors include fibroblast growth factor |