F & E, flexion & extension.

F(hor), horizontal ground reaction force.

F, Fahrenheit degrees.

F, female.

F, phenylalanine.

f.b., foreign body

F.H., family history.

F/H, family history.

F/I, fever due to infection.

F/U, follow-up.

F7, factor VII gene on chromosome 13q34-qter.

FA, failed appointment.

FA, Fanconi's anemia.

FA, fluorapatite.

FA, forearm.

FAA, Federal Aviation Agency .

FAAN, Federal Airport Authority of Nigeria.

Faap(s), fatty acid activation protein(s).

FAAP, F-actin image analysis program.

FAAP, Fellow of the American Academy of Pediatrics.

FAAP, free amino acid pool.

FAAP, functional activity of plasminogen activators in plasma.

FAAP, N-formylaminoantipyrine.

FAAU, functional activity of plasminogen activators in urine.

FAB, French American and British classification scheme for leukemia.

FABERE, flexion, abduction, external rotation and extension.

FABP, fatty acid binding protein.

FACC, Fellow of the American College of Cardiology.

FACES-II, Family Adaptability and Cohesion Evaluation Scales, Version II.

FACOG, Fellow Of The American College Of Obstetrics And Gynecology.

FACP, Fellow of the American College Of Physicians.

FACS, Fellow of the American College Of Surgeons.

FACS, fluorescence-activated cell sorter.

F-actin, filamentous actin.

FACU, Federal Agricultural Coordinating Unit.

FAD, flavin adenine dinucleotide.

FADIR, flexion, adduction and internal rotation.

FADIRE, flexion, adduction, internal rotation and extension.

FALT, follicle-associated lymphoid tissue.

FAMS, functional assessment of multiple sclerosis.

FANA, fluorescent antinuclear antibody test (see also ANA).

FAO, United Nations Food and Agricultural Organization.

FAP, familial adenomatous polyposis.

FAQ , frequently asked questions.

FAS/ITP, Foreign Agriculture Service/International Trade Policy.

FAWC, Farm Animal Welfare Concil (UK).

FB, Fb, fingerbreadth.

FB, foreign body.

FBC, full blood count.

FBD, Familial British dementia.

FBD, feather and beak disease (a bird disease).

FBD, fibrin binding domain.

FBD, fibrocystic breast disease

FBD, Flow-BOLD (blood oxygenation level-dependent) -Dependence.

FBD, food-borne diseases.

FBD, forearm bone density.

FBD, functional bowel disorder/distress.

FBD, functional breathing disorder.

FBI, Federal Bureau of Investigations.

F-BKP, femoral-below-knee-popliteal bypasses.

FBP, filtered back-projection.

FBS, fasting blood sugar.

FC, finger counting.

FCA, fracture, complete, angulated.

FCAPM, formal college approved postgraduate meeting.

FCC, Federal Communications Commission.

FCC, fracture, complete, comminuted; fracture, compound, comminuted.

FCCC, fracture, complete, comminuted, compound.

FCCP, Fellow of the American College Of Chest Physicians.

FCD, fracture, complete, deviated.

FCE, food conversion efficiency.

FCI, flow cytometric immunophenotyping.

FCM, flow cytometry.

FCMC, family-centered maternity care.

FCR, flexor carpi radialis.

FCS, fetal calf serum.

FCT, Federal Capitol Territory.

FCU, flexor carpi ulnaris.

FD, familial dysautonomia.

FDA-BAM, Food & Drug Administration-Bacteriological Analytical Manual.

FDC, follicular dendritic cells.

FDI, first dorsal interosseus (muscle of the hand).

FDIM, fluorescence digital imaging microscopy.

FDIO, first dorsal interosseous (muscle).

FDMA, first dorsal metacarpal artery.

Fd-MIV, Friend derived murine immunosuppressive virus.

FDP, fibrin degradation products.

FDP, flexor digitorum profundus.

FDP, fructose-1,6-diphosphate.

FDS, flexor digitorum superficialis.

FDV, Four dimensional visualization.

Fe, iron.

FEA, focal epileptic activity.

FEB, fever.

FECG, fetal electrocardiogram.

FECS, Federation of European Cancer Societies.

FEF, forced expiratory flow.

FEKG, fetal electrocardiogram.

FEL, familial erythrophagocytic lymphohistiocytosis.

FeLV, feline leukemia virus.

FeNa, fractional excretion of sodium: (UNa x PCr/PNa x UCr) x 100; <1 in prerenal azotemia and 1 in intrinsic renal azotemia.

FEP, free erythrocyte protoporphyrin.

FER, flexion, extension, rotation.

FERC, Federal Energy Regulatory Commission.

FES, functional electrical stimulation.

FES, functional endoscopic sinus.

FES-LCE, functional electrical stimulation (FES)-induced leg cycle ergometer (LCE).

FEV, forced expiratory volume.

FEV₁, forced expiratory volume in one second.

FF, forward flexion.

Ff, free fraction.

FFA, for further appointment.

FFD, free from disability.

FFM, Five-Factor Model of personality.

FFROM, full, free range of motion.

FFS, failure-free survival.

FFS, fee-for-service.

FFS, Five-Factors Score (a prognostic scoring systems).

FFT, forward flexion: fingertips to toes.

FGF, fibroblast growth factor.

FH, family history.

FH, follicular hyperplasia.

FHLH, familial histiocytic lymphohistiocytosis.

FHR, fetal heart rate.

FHS, fetal heart sounds.

FHT, fetal heart tones.

Fib, fibroblasts.

FID, flame ionization detectors (chromatography).

FIN, finasteride.

FINCEN, Financial Center.

FiO₂, fraction of inspired oxygen.

FISH, fluorescence in situ hybridization.

FIT, Fracture Intervention Trial.

FITC, fluorescein isothiocyanate.

FIX, fixed arm support.

FJRM, full joint range of motion.

FL, flank.

FL, flexion.

FL, fluid.

FL, follicular lymphoma.

FL, fully lactating.

FLD, frontal lobe dementia.

Flex, flexion.

FLEX, flexion.

Fli1, Friend leukemia integration 1 gene.

FL-LC, follicular lymphoma large cell.

FL-M, follicular lymphoma mixed small cleaved and large.

FL-SC, follicular lymphoma small cleaved.

FLX, flexion

FMD, family medical doctor.

FMD, foot and mounth disease.

FMF, Foreign Military Funding.

FMH, fetal-maternal hemorrhage.

FMR-1, fragile X mental retardation 1 gene.

FMRP, fragile X mental retardation protein(s).

FMS, fibromyalgia syndrome.

FN, fibronectin.

FNA, fine needle aspiration.

FNAB, fine-needle aspiration biopsy.

FNH, focal nodular hyperplasia.

FNP, family nurse practitioner

FO, fecal output.

FOBT, fecal occult blood testing.

FOC, flight of colors test.

FOP, fibrodysplasia ossificans progressiva.

FOS, full of stool/constipated.

FOSIT, Fosamax International Trial.

FP, fluticasone propionate.

FPA, fibrinopeptide A.

FPB, fibrinopeptide B.

FPB, flexor pollicis brevis.

FPD, fibrin(ogen) degradation products.

FPIA, fluorescence polarization immunoassay.

FPL, flexor pollicis longus.

FPL, functional profile length.

FPM, full passive movements.

FPT, farnesyl protein transferase.

FR, fracture.

FR, frequency of respiration.

FR, full range.

FRBB, fracture of both bones.

FRC, fibroblastic reticulum cells.

FRC, functional residual capacity.

FRCP(C), Fellow of the Royal College of Physicians of Canada.

FRCP, Fellow of the Royal College of Physicians.

FRJM, full range of joint movement.

FROM, full range of motion, full range of movement.

FS, frozen section.

FSC, forward angle light scatter (flow cytometry term).

FSC, fracture, simple comminuted.

FSCAI, Fellow of the Society for Cardiac Angiography and Interventions.

FSCC, fracture, simple, complete, comminuted.

FSCCL, follicular small cleaved cell lymphomas.

FSCPC, fast-setting calcium phosphate cement.

FSD, functional sensory deficit.

FSE, fast-spin-echo.

FSGS, focal and segmental glomerulosclerosis.

FSH, follicle stimulating hormone.

FSN, Foreign Service National.

FSOs, family members and significant others.

FSS, frozen shoulder syndrome.

ft, Foot, feet, (measure).

FT, low-molecular polypeptide factors of thymus.

FT₄, free thyroxin.

FT4I, free thyroxin (T4) index.

FTA-ABS, fluorescent treponemal antibody absorption test.

FTD, frontotemporal dementia.

FTI, farnesyl transferase inhibitor.

FTI, free thyroxin index.

FT-IR, Fourier Transform Infrared Spectroscopy.

FTIR, Fourier Transform Infrared.

FTKA, failed to keep appointment.

FTND, full term normal delivery.

FTNM, The French TNM Group.

FTR, fast-twitch red (skeletal muscle).

FTSG, full thickness skin graft.

FTT, failure to thrive.

FTW, fast-twitch white (skeletal muscle).

FTW, fat weight.

FTW, first time wheezing.

FTY, fat yield.

FU(5-), 5-fluorouracil (treatment regimen).

FU, follow-up.

FUO, fever of undetermined (or unknown) origin.

FVC, forced vital capacity.

FVII, factor VII.

FVIIa, activated factor VII.

FVIIAg, factor VII antigen.

FVIIc, factor VII coagulant activity.

FWB, full weight bearing.

FX, Fx, fracture.

FXBB, fracture of both bones.

FXS, fragile X syndrome.

FY, fiscal year.

FYI, for your information.