| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
|---|---|
| PASP | pancreas-specific protein; pulmonary artery systolic pressure |
| PLISSIT | permission to be sexual, limited information, specific suggestions, intensive therapy |
| PSbetaG | pregnancy-specific beta-1-glycoprotein |
| PSBG | pregnancy-specific beta-1-glycoprotein |