| Py | phosphopyridoxal; polyoma [virus]; pyridine; pyridoxal |
|---|---|
| PYA | psychoanalysis |
| PyC | pyogenic culture |
| PYCR | pyrroline-5-carboxylate reductase |
| PYE | peptone yeast extract |
| PYG | peptone-yeast extract-glucose [broth] |
| PYGM | peptone-yeast-glucose-maltose [broth] |
| PYLL | potential years of life lost |
| PYM | psychosomatic |
| PYP | PYro-Phosphate |