There are multiple definitions:

1. peripheral nervous system(English)

   • CNS

2. parasympathetic nervous system(English)

   • aka PSNS
   • ANS, CNS, PSNS, SNS
   • Nervous activity - (para)sympathetic

3. perinuclear space(English)

   • separates the INM and the ONM
   • NE, INM, ONM
   • Membranes
   • https://doi.org…vir.2015.10.002

4. perineural [tumor] spread(English)

   • FS, MRI, PPF, VIBE
   • Oncology
   • https://doi.org…3244-016-0498-1

5. paranasal sinus(English)

   • functional endoscopic sinus surgery has emerged as the common modality of treatment
   • FESS, OF
   • ENT, Medical imaging
   • https://doi.org…jri.IJRI_119_18

6. primary nephrotic syndrome(English)

   • CRP, FOB, NS, PB, PCT
   • Nephrology
   • https://doi.org…055/a-1288-3670

7. phrenic nerve stimulation(English)

   • BB, BP, CBD, CPG, CVLM, HCSB, HF, HTN, OSA, RAAS, RTN, RVLM, SNS
   • Electrophysiology, Nervous activity - (para)sympathetic
   • https://doi.org….1002/ejhf.2819

8. Panax notoginseng saponin(English)

   • one of the most valuable components of traditional Chinese medicine
   • I/R, NLRP3, SPINK1, PNS, TCM
   • Alternative medicine, Pharmacology / pharmaceutics
   • https://doi.org…83/j.fbl2711300

9. pre- en neonatale screening(Dutch)

   • NIPT, TTSEO, SEO
   • Pregnancy, Neonatal situation, Screening
   • https://www.pns…e-trimester-seo