There are multiple definitions:

1. ventricular premature complex(English)

   • APC
   • Cardiology, Electrophysiology

2. vulval precursor cell(English)

   • there are six types, numbered P3p to P8p
   • EGF, EGFR, MAPK
   • Ovary and uterus, Cell biology
   • https://doi.org…science.1094409