| A/P | abdominal/perineal; antepartum; ascites/plasma [ratio] |
|---|---|
| per | perineal; periodicity, periodic |
| PNB | p-nitrobiphenyl; perineal needle biopsy; peripheral nerve block; premature nodal beat |
| CIX-CXII | ninth to twelfth cranial nerves |
| CN | I to XII first to twelfth cranial nerves |