| RI | radiation intensity; radioactive isotope; radioimmunology; recession index; recombinant inbred [stra... |
|---|---|
| PR | by way of the rectum [Lat. per rectum]; far point [of accommodation] [Lat. punctum remotum]; palindr... |
| EIC | elastase inhibition capacity; enzyme inhibition complex |
| LAI | latex particle agglutination inhibition; leukocyte adherence inhibition |
| PaO2 | partial oxygen tension in arterial blood; partial pressure of oxygen in arterial blood |