| PYC | Pyruvate carboxylase |
|---|---|
| PYD | Pyridinoline |
| PYK | pyruvate kinase |
| PYK2 | Proline-rich Tyrosine Kinase-2 |
| PYLL | Potential Years of Life Lost |
| PYMS | Pyrolysis mass spectrometry |
| PyMT | Polyoma Middle T |
| PyNPase | Pyrimidine nucleoside phosphorylase |
| PYO | person years of observation |
| PYP | 99mTc-pyrophosphate |