| NAC | N-acetylcysteine; National Asthma Center; National Audiovisual Center; Noise Advisory Council |
|---|---|
| NAC-EDTA | N-acetylcysteine EDTA |
| NACDS | North American Clinical Dermatological Society |
| NACED | National Advisory Council on the Employment of the Disabled |
| nAChR | nicotinic acetylcholine receptor |
| NACHRI | National Association of Children's Hospitals and Related Institutions |
| NACOR | National Advisory Committee on Radiation |
| Nacq | number of acquisitions |
| NACSAP | National Alliance Concerned with School-Age Parents |
| NACT | National Alliance of Cardiovascular Technologists |