| PRRF | paramedian pontine reticular formation |
|---|---|
| RAS | rapid atrial stimulation; recurrent aphthous stomatitis; reflex activating stimulus; reliability, av... |
| RET | reticular; reticulocyte; retina; retention; retained; right esotropia |
| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
| RL | radial line; radiation laboratory; reduction level; renal dysplasia-limb defects [syndrome]; resisti... |
| PRN | paramedian reticular nucleus |
|---|---|
| PnC | pontine reticular nucleus |
| RE | reticular |
| RTN | reticular nucleus |