| MSA | major serologic antigen; male-specific antigen; mannitol salt agar; Medical Services Administration;... |
|---|---|
| MUAP | motor unit action potential |
| 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 |