There are multiple definitions:

1. advanced practice nurse(English)

   • SCDNT
   • Nurse / nursing, Education
   • https://doi.org…779608211011993

2. aminopeptidase N(English)

   • a major receptor for several coronaviruses
   • ACE, COVID-19, MERS, SARS, APA
   • Receptors, Virology
   • https://doi.org…pnas.0409465102
   • https://doi.org…srev.00041.2022