| PPG | photoplethysmography; platelet proteoglycan; portal pressure gradient |
|---|---|
| ppg | picopicogram |
| PPGA | postpill galactorrhea-amenorrhea |
| PPGB | protective protein of beta-galactosidase |
| PPGF | polypeptide growth factor |
| PPGP | prepaid group practice |
| ppGpp | 3'-pyrophosphoryl-guanosine-5'-diphosphate |