There are multiple definitions:

1. free fatty acids(English)

   • FFAR
   • Biochemistry

2. frontale fibrosing alopecia(English)

   • more prominent apoptosis and less inflammation than found in LPP, along with spared interfollicular epidermis
   • LPP
   • Dermatology, Apoptosis
   • https://doi.org…32.2006.02507.x

3. fundus fluorescein angiography(English)

   • a specialist ophthalmic test to visualize the retinal vasculature. Conventionally performed through intravenous injection of 10–20% sodium fluorescein dye, following which serial retinal imaging (~490 nm wavelength) is used to dynamically visualize retinal flow, circulation and vascular integrity. A clinically valuable test in many conditions, in particular those causing non-perfusion, leakage, edema, or other vascular anomalies
   • ICG, ICGA
   • Ophthalmology, Fluorescence
   • https://doi.org…433-020-01328-6
   • https://pubmed.…h.gov/31869169/

4. fusiform face area(English)

   • functional localizers are particularly prevalent in functional magnetic resonance imaging studies concerning face processing
   • FIR, fMRI, OFA, FA, EBA, ECE, FBA, LOC, PPA
   • Medical imaging, Brain (dys)function
   • https://doi.org…al.pone.0214997
   • https://doi.org…/rstb.2006.1934