| PCPA | para-chlorophenylalanine |
|---|---|
| PDAB | para-dimethylaminobenzaldehyde |
| PMA | index of prevalence and severity of gingivitis, where P = papillary gingiva, M = marginal gingiva, a... |
| PMB | papillomacular bundle; para-hydroxymercuribenzoate; polychrome methylene blue; polymorphonuclear bas... |
| PNP | pancreatic polypeptide; para-nitrophenol; peak negative pressure; pediatric nurse practitioner; peri... |