| NCR | National Research Council; neutrophil chemotactic response; no carbon required; nuclear/cytoplasmic ... |
|---|---|
| NMR | neonatal mortality rate; nictitating membrane response; nuclear magnetic resonance |
| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |
| NRC | National Research Council; National Response Center; normal retinal correspondence; not routine care... |
| OORR | orbicularis oculi reflex response |