There are multiple definitions:

1. complement fixation test(English)

   • a blood test in which a sample of serum is exposed to a particular antigen and complement in order to determine whether or not antibodies to that particular antigen are present
   • ELISA
   • Clinical chemistry, Immunology
   • https://bio.lib…lement_Fixation

2. continuous Fourier transform(English)

   • DFT, ICFT, IDFT
   • Signal analysis

3. continuous feature tracking(English)

   • Medical imaging, Ultrasound

4. central foveal thickness(English)

   • defined as the distance between the vitreoretinal interface and the anterior surface of the RPE
   • OCT, RPE
   • Ophthalmology
   • https://doi.org…opt.2014.10.003

5. cold face test(English)

   • a non-invasive challenge maneuver of the autonomic nervous system which activates the peripheral sympathetic and the cardiac parasympathetic nervous system and induces peripheral vasoconstriction and bradycardia
   • Nervous activity - (para)sympathetic, Stress (test), Signal analysis
   • https://doi.org…7/s102860200024

6. coronary [vasomotor] function testing(English)

   • diagnostic tool to assess the various endotypes of coronary vasomotor dysfunction in patients with angina and no obstructive coronary artery disease. It involves using drugs like acetylcholine to provoke spasm and adenosine to assess microvascular function
   • ACh, ANOCA, BMI, CAS, CFR, CMD, CVD, HFpEF, HMR, INOCA, MVA, PAWP, RHC, VSA
   • Coronary circulation, Endothelium, Diagnostics, Stress (test), Pathology, Adiposity
   • https://doi.org…/EIJ-D-21-00402
   • https://doi.org…cvm.2021.750071
   • https://doi.org…chf.2025.102894
   • https://doi.org…/EIJ-D-21-00402