| pre-AIDS | pre-acquired immune deficiency syndrome |
|---|---|
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| pi | post-injection |
| PM | after death (Lat. post mortem); after noon [Lat. post meridiem]; mean pressure; pacemaker; pantomogr... |
| Gd | gadolinium |