| MSA | major serologic antigen; male-specific antigen; mannitol salt agar; Medical Services Administration;... |
|---|---|
| MTAC | mass transfer area coefficient |
| MVA | mechanical ventricular assistance; mevalonic acid; mitral valve area; motor vehicle accident |
| MVOA | mitral valve orifice area |
| NCA | National Certification Agency; National Council on Aging; National Council on Alcoholism; neurocircu... |