| LID | large intraluminal density; late immunoglobulin deficiency; lymphocytic infiltrative disease |
|---|---|
| MADD | Mothers Against Drunk Driving; multiple acyl-CoA dehydrogenase deficiency |
| MEDAC | multiple endocrine deficiency, Addison's disease, and candidiasis [syndrome] |
| MPOD | myeloperoxidase deficiency |
| MSD | material safety data; mean square deviation; mild sickle cell disease; most significant digit; multi... |