| PERRLA | pupils equal, round, and reactive to light and accommodation |
|---|---|
| PORH | postoperative reactive hyperemia |
| PRA | panel-reactive antibody; phosphoribosylamine; physician recognition award; plasma renin activity; pr... |
| PUM | peanut-reactive urinary mucin |
| RA | radioactive; ragocyte; ragweed antigen; rapidly adapting [receptors]; reactive arthritis; reciprocal... |