| NI | neuraminidase inhibition; neurological improvement; neutralization index; no information; noise inde... |
|---|---|
| NIHL | noise-induced hearing loss |
| NIPTS | noise-induced permanent threshold shift |
| NNI | noise and number index |
| NR | do not repeat [Lat. non repetatur]; nerve root; neural retina; neutral red; noise reduction; nonreac... |