| NAHSA | National Association for Hearing and Speech Action |
|---|---|
| NAP | nasion, point A, pogonion [convexity or concavity of the facial profile]; nerve action potential; ne... |
| NAR | nasal airway resistance; National Association for Retarded [Children, Citizens]; no action required |
| NARAL | National Abortion Rights Action League |
| NAT | N-acetyltransferase; natal; neonatal alloimmune thrombocytopenia; no action taken; nonaccidental tra... |