| NAF | nafcillin; National Amputation Foundation; National Ataxia Foundation; net acid flux |
|---|---|
| NAI | net acid input; no accidental injury; no acute inflammation; nonadherence index |
| NDP | net dietary protein; nucleoside diphosphate |
| NET | nasoendotracheal tube; nerve excitability test; neuroectodermal tumor; neuroendocrine tumor; norepin... |
| NHR | net histocompatibility ratio |