| 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... |
| OSA | obstructive sleep apnea; Office of Services to the Aging; Optical Society of America; ovarian sectio... |