There are multiple definitions:

1. flocculation reaction(English)

   • a process by which colloidal particles come out of suspension to sediment under the form of floc or flake, either spontaneously or due to the addition of a clarifying agent
   • Biochemistry

2. ferrireductase(English)

   • involved in transport of iron across biological membranes through metal transporters
   • NTBI, PrPC, PrPSC, ZIP
   • Membranes, Virology
   • https://doi.org…96.2015.1118602

3. farrowing rate(English)

   • diseases of the urogenital tract, often referred to collectively as the vaginal discharge complex, contribute to poor farrowing rates mainly through the associated increase in regular and irregular returns and decrease in productivity in general
   • Urology, Veterinary medicine, Bacteriology
   • https://doi.org…69323-1.50109-4

4. frame rate(English)

   • Cardiology, Echography/ultrasound
   • https://doi.org…cho.2020.12.013

5. foam rolling(English)

   • has been developed into a popular intervention and has been established in various sports disciplines
   • EA, NEA
   • Sports medicine, Exercise & Training
   • https://doi.org…3/jsr.2019-0172

6. food responsiveness(English)

   • refers to prospective relationships from appetite to adiposity measures
   • AEBQ, BEBQ, BMI, BMIz, CEBQ, EOE, EUE, FF, SE, SR
   • Adiposity, Nutrition
   • https://doi.org….1111/obr.13169

7. fixed resistance(English)

   • refers to he effect an individual’s exercise training type on the muscle fatigability during repetitive contractions induced by Neuromuscular Electrical Stimulation
   • NMES
   • Exercise & Training, Myocyte / muscle, Fatigue
   • http://frontier…894395/abstract

8. flexion reflex(English)

   • used to evaluate the clinical usefulness of lower limb flexion reflexes in the assessment of spinal excitability responsible for spontaneous or induced spasms
   • Neurology, Psychology, Spine (or spinal cord)
   • https://doi.org…980x(96)96555-8

9. firing rate(English)

   • refers to electromyographic fatigue representations in muscles of subjects after stroke at the level of motor unit
   • EMG, FR, MINI, MO, MPF, MUAPT, MVC, NTF
   • Electrophysiology, Post-traumatic state, Musculoskeletal system, Fatigue
   • https://doi.org…kin.2005.09.005

10. fatigue rate(English)

    • DS, ES
    • Fatigue, Exercise & Training, Sports medicine
    • https://doi.org…62-6050-48.4.16

11. folfate receptor(English)

    • AuNP, BMV, GNC, ICG, MSNP, NP, PAI, PLGA
    • Receptors, Molecular biology, Oncology
    • https://doi.org…55/2019/5080267

12. friction rub(English)

    • Respiratory system

13. frequent relapse(English)

    • IFR, SSNS
    • Pathology, Prognosis
    • https://doi.org…319-2442.174075

14. flexible reaming(English)

    • ACL, ACLR, AM, RR
    • Knee, Surgery, Orthopedics
    • https://doi.org…259671211035741

15. fixed-ratio(English)

    • PR, FR1
    • Ratio-based metric
    • https://doi.org…68.2005.04159.x

16. Fischer's ratio(English)

    • refers to plasma branched-chain amino acid to aromatic amino acid ratio
    • AA, HF, LVEDP, LVEF
    • Ratio-based metric, Cardiology, Prognosis
    • https://doi.org…872-024-04433-6