| DRR | digitally reconstructed radiograph; Division of Research Resources [NIH]; dorsal root reflex |
|---|---|
| DRT | dorsal root, thoracic |
| EARR | extended aortic root replacement |
| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |
| PAR | participating provider; passive avoidance reaction; perennial allergic rhinitis; photosynthetically ... |