There are multiple definitions:

1. phenylpropanolamine(English)

2. prolonged PA-interval(English)

3. Prescription Pricing Authority(English)

   • Pharmacology / pharmaceutics

4. palpation, percussion, and auscultation(English)

   • Physical examination

5. Pittsburgh pneumonia agent(English)

   • see Tatlockia micdadei
   • Pulmonology

6. primary progressive aphasia(English)

   • a diverse group of disorders that collectively present with relatively focal degeneration of the brain systems that govern language. These ‘language-led dementias’ with 3 major variants remain daunting for even experienced clinicians to diagnose and manage
   • lvPPA, MRI, nfvPPA, svPPA, AD, ARTFL, CU, CDR, CSF, FAQ, FTD, GDS, MCI, MMSE, NfL, PCA, PET, PSP, SEADL, SUVR, TDP, TES, 18F-FTP
   • Brain (dys)function, Alzheimer's disease, Speaking / language [incl. disorders], Aphasia
   • https://doi.org…0415-018-8762-6
   • https://doi.org…4422(21)00214-3

7. peripapillary atrophy(English)

   • β-PPA, ONH, VFD, HDD, PPW, VDD
   • Ophthalmology
   • https://doi.org…598-021-88832-1
   • https://doi.org…al.pone.0131781

8. partially parallel acquisition(English)

   • method that can be used to accelerate image acquisition using an RF coil array for spatial encoding
   • ASSET, GRAPPA, NAMIC, PPA, RF
   • Medical imaging
   • https://doi.org….1002/mrm.10171

9. parahippocampal place area(English)

   • refers to brain areas that process data on places and scenes
   • ECoG, PHC, SEEG, EBA, ECE, FBA, FFA, fMRI, LOC, DCM, sDCM
   • Anatomy, Brain (dys)function
   • https://doi.org…429-021-02441-2
   • https://doi.org…75070-9.00006-1
   • https://doi.org…age.2017.04.040
   • https://doi.org…sci.2023.107765

10. polypyrrole propylic acid(English)

    • refers to a probe that is covalently attached to the electrode surface via electropolymerized film
    • ELISA, IgG, PAPP
    • Bioengineering, Immunology
    • https://doi.org/10.1039/b712394a

11. parapapillary atrophy(English)

    • AS, BM, DH, IOP, LC, LCD, ONH, POAG, RNFL, SD, LCCI
    • Ophthalmology
    • https://doi.org…gla.2018.05.007

12. problematic physical activity(English)

    • its study faces both theoretical and methodological challenges
    • BCFA, CFA, EDS-R
    • Exercise & Training
    • https://10.1177…315125231218745

13. pulse pressure amplification(English)

    • AIx, DAP, FF, MAP, PP, SAP
    • Hemodynamics, Aging, Hypertension, Ratio-based metric
    • https://doi.org…JAHA.124.037064

14. pulse pressure analysis(English)

    • it took almost 90 more years before Wesseling developed the first real-time cardiac output monitor based on this approach
    • CO, PP, SV
    • Hemodynamics, Signal analysis, Model(ing)
    • https://doi.org…0134-011-2154-z