| PEFV | partial expiratory flow volume |
|---|---|
| PH2O | partial pressure of water vapor |
| PIO2 | partial pressure of inspired oxygen |
| PLV | partial liquid ventilation; poliomyelitis live vaccine; panleukopenia virus; phenylalanine, lysine, ... |
| PM | after death (Lat. post mortem); after noon [Lat. post meridiem]; mean pressure; pacemaker; pantomogr... |