| NAPH | naphthyl; National Association of Public Hospitals; National Asthma Education Program; nicotinamide ... |
|---|---|
| NAS | nasal; National Academy of Sciences; National Association of Sanitarians; neonatal airleak syndrome;... |
| NAS-NRC | National Academy of Science-National Research Council |
| NCD | National Commission on Diabetes; National Council on Drugs; neurocirculatory dystonia; nitrogen clea... |
| NCTC | National Cancer Tissue Culture; National Collection of Type Cultures |