| pH-stat | apparatus for maintaining the pH of a solution |
|---|---|
| PhyS | physiologic saline [solution] |
| pOH | hydroxide ion concentration in a solution |
| PSS | painful shoulder syndrome; physiologic saline solution; porcine stress syndrome; primary Sjogren syn... |
| RL | radial line; radiation laboratory; reduction level; renal dysplasia-limb defects [syndrome]; resisti... |