| NCX | sodium-calcium exchanger |
|---|---|
| NHE | sodium-hydrogen exchanger |
| NPT | neoprecipitin test; nocturnal penile tumescence; normal pressure and temperature; sodium phosphate t... |
| NS | natural science; Neosporin; nephrosclerosis; nephrotic syndrome; nervous system; neurological surger... |
| NUC | nonspecific ulcerative colitis; sodium urate crystal |