There are multiple definitions:

1. pediatric condition falsification(English)

   • APSAC, FDP, MSBP

2. photonic crystal fiber(English)

   • NLO, NIR, PCFI, FBG, MIS, CARS
   • Photonics
   • https://doi.org…859-022-05059-1

3. pontine crossing fiber(English)

   • originating from the contralateral pontine nuclei and conforming the middle cerebellar peduncles (MCP)
   • AICA, DTI, MCP, MRI, PCF, PRES
   • Brain (dys)function
   • https://doi.org…/wjr.v7.i12.438

4. (broncho)pulmonary C-fiber(English)

   • PNE, TRPV1, SIDS
   • Pulmonology
   • https://doi.org…aap.2015.10.023

5. pharyngoconjunctival fever(English)

   • EKC
   • Virology, Ophthalmology
   • https://doi.org….3390/v11050395

6. protein corona fingerprint(English)

   • PANC, PDAC, BC, DLS, FACS, FDA, HP, INS, MS
   • Pancreas, Oncology, Gland(ular)
   • https://doi.org…ceutics11010031