| IMPA | incisal mandibular plane angle |
|---|---|
| LA | lactic acid; large amount; laser angioplasty; late abortion; late antigen; latex agglutination; left... |
| MA | malignant arrhythmia; management and administration; mandelic acid; masseter; Master of Arts; matern... |
| mA, ma | milliampere; meter-angle |
| MAR | main admissions room; marasmus; marrow; maximal aggregation ratio; medication administration record;... |