| MRVP | mean right ventricular pressure; methyl red, Voges-Proskauer [medium] |
|---|---|
| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |
| NRbc | nucleated red blood cell |
| NRU | neutral red uptake |
| NZR | New Zealand red [rabbit] |